Title: £297 Cheap Flights from Kathmandu to Sydney (KTM to SYD) - Expedia.co.uk ![](https://images.trvl-media.com/place/178312/136253ce-3061-45f8-b8d7-9d9fb2223786.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178312/136253ce-3061-45f8-b8d7-9d9fb2223786.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £297 Cheap Flights from Kathmandu (KTM) to Sydney (SYD) [View £297 flight on Fri, 28 Nov 2025](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:KTM,to:SYD,departure:28/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:296.60&airProductToken=AQpaCisIs6oBEgQzOTAyGOpkILOhASirof4CMIej_gI4QkAAWAFyCFUxQUREQTY3CisIs6oBEgQzODkxGLOhASCSHiiwpv4CMJyr_gI4VUABWAFyCFUxQUREQTY3EgoIARABGAEqAkhSGAEiBAgBEAEoAigDKAQwAQ) - [Return](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Tribhuvan Intl. Airport (KTM) to Sydney Airport (SYD) - ![Emirates](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_EK.svg) Emirates [](https://www.expedia.co.uk/Flights-Search?leg1=from:ktm,to:syd,departure:01/11/2025TANYT&leg2=from:syd,to:ktm,departure:08/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"EK"}}]) - ![Air India](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AI.svg) Air India [](https://www.expedia.co.uk/Flights-Search?leg1=from:ktm,to:syd,departure:01/11/2025TANYT&leg2=from:syd,to:ktm,departure:08/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AI"}}]) - ![China Southern Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_CZ.svg) China Southern Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ktm,to:syd,departure:01/11/2025TANYT&leg2=from:syd,to:ktm,departure:08/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"CZ"}}]) - ![Cathay Pacific](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_CX.svg) Cathay Pacific [](https://www.expedia.co.uk/Flights-Search?leg1=from:ktm,to:syd,departure:01/11/2025TANYT&leg2=from:syd,to:ktm,departure:08/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"CX"}}]) - ![Singapore Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_SQ.svg) Singapore Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ktm,to:syd,departure:01/11/2025TANYT&leg2=from:syd,to:ktm,departure:08/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"SQ"}}]) - ![Qatar Airways](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_QR.svg) Qatar Airways [](https://www.expedia.co.uk/Flights-Search?leg1=from:ktm,to:syd,departure:01/11/2025TANYT&leg2=from:syd,to:ktm,departure:08/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"QR"}}]) - ![China Eastern Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_MU.svg) China Eastern Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:ktm,to:syd,departure:01/11/2025TANYT&leg2=from:syd,to:ktm,departure:08/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"MU"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 25% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Cheap Flights from Kathmandu (KTM) to Sydney (SYD) Prices were available within the past 7 days and start at £297 for one-way flights and £557 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Sichuan Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/3U.gif) Fri, 5 Dec - Sun, 11 Jan KTM Kathmandu SYD Sydney £557 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:05/12/2025TANYT&leg2=from:SYD,to:KTM,departure:11/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:556.60&airProductToken=AQpaCisIs6oBEgQzOTAyGOpkILOhASiL8P4CMOfx_gI4QkAAWAFyCFUxQURFQjY3CisIs6oBEgQzODkxGLOhASCSHiiQ9f4CMPz5_gI4VUABWAFyCFUxQURFQjY3CloKKwizqgESBDM4OTIYkh4gs6EBKJGSggMwjJeCAzhVQABYAXIIVTFBREVCNjcKKwizqgESBDM5MDEYs6EBIOpkKIGZggMwj5uCAzhCQAFYAXIIVTFBREVCNjcSCggBEAEYASoCSFIYASIECAEQASgCKAMoBDAB) ![China Eastern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MU.gif) Thu, 6 Nov - Thu, 13 Nov KTM Kathmandu SYD Sydney £570 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:06/11/2025TANYT&leg2=from:SYD,to:KTM,departure:13/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:569.20&airProductToken=AQqDAQoqCM2qARIEOTYxOBjqZCCKMyiDrPwCMLet_AI4U0AAWAFyCFNMRTAzQ1NTCioIzaoBEgQyNDg2GIozIJY9KJ20_AIwpLX8AjhCQAFYAXIIWlNEMDBPU1gKKQjNqgESAzc0ORiWPSCSHiibuPwCMKC9_AI4WkABWAFyCFpTRDAwT1NYCoMBCikIzaoBEgM3NTAYkh4glj0o1vb8AjDW-_wCOFRAAFgBcghUU0QwME9TWAoqCM2qARIEMjQ4NRiWPSCKMyirgf0CMLeC_QI4QkABWAFyCFRTRDAwT1NYCioIzaoBEgQ5NjE3GIozIOpkKOaD_QIwx4X9AjhUQAFYAXIIVExFMDNDU1MSCggBEAEYASoCTVUYASIECAEQASgCKAMoBDAB) ![China Eastern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MU.gif) Wed, 29 Oct - Wed, 19 Nov KTM Kathmandu SYD Sydney £573 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:29/10/2025TANYT&leg2=from:SYD,to:KTM,departure:19/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:572.20&airProductToken=AQqPAQouCM2qARIEOTYxOBjqZCCKMyiD0vsCMLLT-wI4U0AAWAFqAkVTcghTTEUwM0NTUwouCM2qARIEMjcxNhiKMyDNMiiP2PsCMKDZ-wI4QkABWAFqAkVTcghUU0QwME9TWAotCM2qARIDNzkxGM0yIJIeKIfe-wIwoOP7AjhUQAFYAWoCRVNyCFRTRDAwT1NYCo8BCi0IzaoBEgM3OTIYkh4gzTIolrr9AjCWv_0COFpAAFgBagJFU3IIWlNEMDBPU1gKLgjNqgESBDI3MDUYzTIgijMokcT9AjDAxf0COEJAAVgBagJFU3IIWlNEMDBPU1gKLgjNqgESBDk2MTcYijMg6mQopsf9AjCHyf0COFRAAVgBagJFU3IIVExFMDNDU1MSCggBEAEYASoCTVUYASIECAEQASgCKAMoBDAB) ![China Eastern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MU.gif) Sun, 30 Nov - Tue, 20 Jan KTM Kathmandu SYD Sydney £581 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:30/11/2025TANYT&leg2=from:SYD,to:KTM,departure:20/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:580.60&airProductToken=AQqDAQoqCM2qARIEOTYxOBjqZCCKMyiDuv4CMLK7_gI4U0AAWAFyCFNMRTAzQ1NTCioIzaoBEgQ1MjgyGIozIK81KOnA_gIwi8P-AjhCQAFYAXIIVFNEMDBPU1gKKQjNqgESAzU2MRivNSCSHiiHxv4CMOTK_gI4VEABWAFyCFRTRDAwT1NYCoQBCioIzaoBEgM3NjQYkh4gl8IBKJDzggMwqPqCAzhaQABYAXIIWlNFMDBPU1gKKwjNqgESBDIzNjEYl8IBIIozKJuAgwMwsYGDAzhCQAFYAXIIVkxFMDNDU1MKKQjNqgESAzc1NxiKMyDqZCjKi4MDMKuNgwM4VkABWAFyCFZMRTAzQ1NTEgoIARABGAEqAk1VGAEiBAgBEAEoAigDKAQwAQ) ![China Eastern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MU.gif) Sun, 30 Nov - Tue, 20 Jan KTM Kathmandu SYD Sydney £583 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:30/11/2025TANYT&leg2=from:SYD,to:KTM,departure:20/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:582.71&airProductToken=AQqOAQouCM2qARIEOTYxOBjqZCCKMyiDuv4CMLK7_gI4U0AAWAFqAkVTcghTTEUwM0NTUwotCM2qARIDNzQ3GIozIK81KM6__gIwgsH-AjhCQAFYAWoCRVNyCFpTRDAwT1NYCi0IzaoBEgM1NjEYrzUgkh4oh8b-AjDkyv4COFpAAVgBagJFU3IIWlNEMDBPU1gKjwEKLQjNqgESAzU2MhiSHiCvNSj88oIDMPL3ggM4WkAAWAFqAkVTcghaU0QwME9TWAouCM2qARIENTgxOBivNSCKMyjb-IIDMLf6ggM4QkABWAFqAkVTcghaU0QwME9TWAouCM2qARIEOTYxNxiKMyDqZCjmgIMDMMeCgwM4VkABWAFqAkVTcghWTEUwM0NTUxIKCAEQARgBKgJNVRgBIgQIARABKAIoAygEMAE) ![China Eastern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MU.gif) Thu, 6 Nov - Thu, 13 Nov KTM Kathmandu SYD Sydney £585 Return found 4 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:06/11/2025TANYT&leg2=from:SYD,to:KTM,departure:13/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:584.06&airProductToken=AQqDAQoqCM2qARIEOTYxOBjqZCCKMyiDrPwCMLet_AI4U0AAWAFyCFNMRTAzQ1NTCioIzaoBEgQ1ODg1GIozIJY9KOyx_AIw87L8AjhCQAFYAXIIWlNEMDBPU1gKKQjNqgESAzc0ORiWPSCSHiibuPwCMKC9_AI4WkABWAFyCFpTRDAwT1NYCoMBCikIzaoBEgM3NTAYkh4glj0o1vb8AjDW-_wCOFRAAFgBcghUU0QwME9TWAoqCM2qARIEMjQ4NRiWPSCKMyirgf0CMLeC_QI4QkABWAFyCFRTRDAwT1NYCioIzaoBEgQ5NjE3GIozIOpkKOaD_QIwx4X9AjhUQAFYAXIIVExFMDNDU1MSCggBEAEYASoCTVUYASIECAEQASgCKAMoBDAB) ![China Eastern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MU.gif) Fri, 19 Dec - Fri, 16 Jan KTM Kathmandu SYD Sydney £596 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:19/12/2025TANYT&leg2=from:SYD,to:KTM,departure:16/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:596.00&airProductToken=AQqDAQoqCM2qARIEOTYxOBjqZCCKMyjjj4ADMJKRgAM4QkAAWAFyCFRTRTAwQ1NGCioIzaoBEgQyNzI2GIozIM0yKLqWgAMwy5eAAzhCQAFYAXIIVFNFMDBDU0YKKQjNqgESAzc5MRjNMiCSHijnm4ADMIChgAM4VEABWAFyCFRTRTAwQ1NGCoIBCikIzaoBEgM3OTIYkh4gzTIo1saCAzDWy4IDOFRAAFgBcghUU0UwMENTRgoqCM2qARIEMjcwNRjNMiCKMyjR0IIDMIDSggM4QkABWAFyCFRTRTAwQ1NGCikIzaoBEgM3NTcYijMg6mQoqtOCAzCL1YIDOEJAAVgBcghUU0UwMENTRhIKCAEQARgBKgJNVRgBIgQIARABKAIoAygEMAE) ![Malaysia Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MH.gif) Thu, 11 Jun - Sun, 21 Jun KTM Kathmandu SYD Sydney £612 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:11/06/2026TANYT&leg2=from:SYD,to:KTM,departure:21/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:611.70&airProductToken=AQp-CigIzZABEgMxMTUY6mQgil0o_LePAzCUuo8DOFNAAFgBcgdVTUhGTlBJCigI0KQBEgM1MjYYil0grFso_LyPAzDnvo8DOFVAAVgBcgdVTUhGTlBJCigI0KQBEgMyMTEYrFsgkh4o8sGPAzCxxo8DOFVAAVgBcgdVTUhGTlBJCn4KKAjQpAESAzIxMhiSHiCsWyifoZADMNKkkAM4VUAAWAFyB1VNSEZOUEkKKAjQpAESAzUyORisWyCKXSiQppADMPGnkAM4VUABWAFyB1VNSEZOUEkKKAjNkAESAzE3MBiKXSDqZCi6rJADMNeukAM4U0ABWAFyB1VNSEZOUEkSCggBEAEYASoCUFIYASIECAEQASgCKAMoBDAB) ![China Southern Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/CZ.gif) Sun, 14 Dec - Tue, 13 Jan KTM Kathmandu SYD Sydney £630 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:14/12/2025TANYT&leg2=from:SYD,to:KTM,departure:13/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:629.50&airProductToken=AQpXCioIw7QBEgQzMDY4GOpkIIJoKMna_wIww9z_AjhaQABYAXIIWjJMU1ZZWFAKKQjDtAESAzYwMRiCaCCSHiiY4v8CMNfm_wI4WkABWAFyCFoyTFNWWVhQClcKKQjDtAESAzMyNhiSHiCCaCj5o4IDMLioggM4WkAAWAFyCFoyTFNWWVhQCioIw7QBEgQzMDY3GIJoIOpkKIipggMwzauCAzhaQAFYAXIIWjJMU1ZZWFASCggBEAEYASoCQ1oYASIECAEQASgCKAMoBDAB) ![Singapore Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SQ.gif) Sat, 23 May - Mon, 15 Jun KTM Kathmandu SYD Sydney £666 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:KTM,to:SYD,departure:23/05/2026TANYT&leg2=from:SYD,to:KTM,departure:15/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:665.20&airProductToken=AQpzCjcI06IBEgM0NDEY6mQgkmooq-KNAzDc5I0DOEtAAFgBagxFY29ub215IExpdGVyCEsyNU5QUlBPCjgI06IBEgQ4NTk4GJJqIJIeKPjtjQMwv_GNAzhLQAFYAWoMRWNvbm9teSBMaXRlcghLMjVOUFJQTwp1CjkI06IBEgQ4NTk5GJIeIJJqKKrejwMwo-KPAzhOQABYAWoNRWNvbm9teSBWYWx1ZXIITjI1TlBSUE8KOAjTogESAzQ0MhiSaiDqZCiv7Y8DMODvjwM4TkABWAFqDUVjb25vbXkgVmFsdWVyCE4yNU5QUlBPEgoIAhABGAEqAlNRGAEiBAgBEAEoAigDKAQwDw) ## Find the cheapest month to fly from Kathmandu (KTM) to Sydney (SYD) ### September is typically the cheapest month to fly From £526 - £957 per traveller. ## Frequently asked questions ### How much is a flight from KTM to Mascot Airport? > Pack your bags, because round-trip journeys from Tribhuvan Intl. Airport to Sydney Airport start from £557. That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can change quickly, so book today to score the best deal. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Tribhuvan Intl. Airport (KTM) to Mascot Airport? > Every air carrier has its own set of terms and conditions. If you decide to cancel your trip, visit our [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033). ### How do I find cheap flights from KTM to Mascot Airport that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Tribhuvan Intl. Airport (KTM) to SYD flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from KTM to Sydney Airport? > The distance is around 9,800 kilometres, so pack your carry-on bag with all you need to make your journey comfortable. Wondering what to take on board your Kathmandu to Sydney flight? A travel pillow, earplugs and a sleep mask are among the essentials. ### Which airlines fly direct from Tribhuvan Intl. Airport (KTM) to Sydney Airport? > There are no direct flights, so you'll need to make at least one stop between Tribhuvan Intl. Airport (KTM) and SYD. Use the layover time to stretch your legs and grab a bite to eat. ### Are Tribhuvan Intl. Airport (KTM) to Kingsford Smith Intl. Airport (SYD) flight tickets cheaper when they're purchased at the last minute? > Booking last minute from KTM to Kingsford Smith Intl. Airport (SYD) can be hit-or-miss. You might be lucky and score a bargain, but you could also completely miss out! If you'd rather play it safe and start planning early, Expedia compares flight deals up to a year in advance. Just bear in mind that not all airlines release their prices that far in advance. Our suggestion? Check back often as updates are made regularly. ## Travel information | Origin airport | Tribhuvan Intl. | | --- | --- | | Destination airport | Kingsford Smith Intl. | | Airlines serving | Air India, Cathay Pacific, China Eastern Airlines, China Southern Airlines, Emirates, Etihad Airways, Malaysia Airlines, Qatar Airways, Sichuan Airlines, Singapore Airlines, SriLankan Airlines, Thai Airways International, Turkish Airlines | | Return price | £557 | | Distance | 9685 km | ## Book with confidence ### Compare flights from Kathmandu to Sydney easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Kathmandu to Sydney. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Kingsford Smith Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Tribhuvan Intl. to Kingsford Smith Intl..   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Tribhuvan Intl. (KTM) to Kingsford Smith Intl. (SYD) The easiest way to view the best deals on flights from Kathmandu to Sydney today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Tribhuvan Intl. to Kingsford Smith Intl. start at just £557 and range up to £666.   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Kathmandu and Sydney - booking your flight during December, the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your Kathmandu to Sydney flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Tribhuvan Intl. to Kingsford Smith Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. 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