Title: Cheap Flights to Ontario - Expedia.co.uk ![Malheur Butte Ontario Oregon](https://images.trvl-media.com/place/9223/5cf553e3-9c33-4892-9d27-8210f9490c2f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/9223/5cf553e3-9c33-4892-9d27-8210f9490c2f.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £58 Cheap Flights to Ontario [View £58 flight on Fri, 10 Apr 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:LAS,to:BOI,departure:10/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:57.50&airProductToken=AQowCi4IwaYBEgMyMjgYi5ABIMFDKJODigMwhISKAzhYQABYAWoCU1ZyCE9IMk9BVkJOEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwAQ) - [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 [Hotels in Ontario](https://expedia.co.uk/Ontario-Hotels.d9223.Travel-Guide-Hotels)[Ontario Car Hire](https://expedia.co.uk/Compare-Cheap-Car-Hire-In-Ontario.d9223.Car-Hire-Guide)[Ontario Holidays](https://expedia.co.uk/Ontario.d9223.Holidays-City-Breaks) ## Popular airlines to Ontario - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Ontario, Oregon, United States of America,departure:23/02/2026TANYT&leg2=from:Ontario, Oregon, United States of America,to:CMH,departure:02/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Ontario, Oregon, United States of America,departure:23/02/2026TANYT&leg2=from:Ontario, Oregon, United States of America,to:CMH,departure:02/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Ontario, Oregon, United States of America,departure:23/02/2026TANYT&leg2=from:Ontario, Oregon, United States of America,to:CMH,departure:02/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Ontario, Oregon, United States of America,departure:23/02/2026TANYT&leg2=from:Ontario, Oregon, United States of America,to:CMH,departure:02/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Ontario, Oregon, United States of America,departure:23/02/2026TANYT&leg2=from:Ontario, Oregon, United States of America,to:CMH,departure:02/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Ontario, Oregon, United States of America,departure:23/02/2026TANYT&leg2=from:Ontario, Oregon, United States of America,to:CMH,departure:02/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Ontario, Oregon, United States of America,departure:23/02/2026TANYT&leg2=from:Ontario, Oregon, United States of America,to:CMH,departure:02/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![](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\* - ![](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\* - ![](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 round-trip flights to Ontario Prices were available within the past 7 days and start at £58 for one-way flights and £100 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, 14 Apr - Tue, 28 Apr SEA Seattle BOI Boise £100 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:SEA,to:BOI,departure:14/04/2026TANYT&leg2=from:BOI,to:SEA,departure:28/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:100.00&airProductToken=AQoiCiAIxJgBEgQzNjkyGJIBIMFDKM6vigMwrLCKAzhFQABYAQoiCiAIxJgBEgQzNzUwGMFDIJIBKOnIiwMw1MmLAzhFQABYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Wed, 4 Mar - Sat, 7 Mar PDX Portland BOI Boise £102 Return just found [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:PDX,to:BOI,departure:04/03/2026TANYT&leg2=from:BOI,to:PDX,departure:07/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:101.10&airProductToken=AQowCi4IwaYBEgM0NDcY77gBIMFDKJTkhgMw4-SGAzhYQABYAWoCU1ZyCE9IMkVYVUJOCjAKLgjBpgESAzI2MhjBQyDvuAEo5oKHAzC-g4cDOFhAAFgBagJTVnIIT0gyRVhVQk4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAB) ![Hawaiian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/HA.gif) Tue, 10 Mar - Sat, 21 Mar LAX Los Angeles BOI Boise £123 Return just found [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LAX,to:BOI,departure:10/03/2026TANYT&leg2=from:BOI,to:LAX,departure:21/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:122.30&airProductToken=AQojCiEIyIIBEgQ2MTUyGIu4ASDBQyjAoYcDMMSihwM4VUAAWAEKRQogCMiCARIENDgyNRjBQyCSASjkoIgDMM2hiAM4VUAAWAEKIQjIggESBDY4MDMYkgEgi7gBKJyiiAMww6OIAzhVQAFYARIKCAEQARgBKgJIQRgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Fri, 6 Mar - Sun, 22 Mar LAX Los Angeles BOI Boise £182 Return just found [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LAX,to:BOI,departure:06/03/2026TANYT&leg2=from:BOI,to:LAX,departure:22/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:181.70&airProductToken=AQojCiEI1YIBEgQ1MzYzGIu4ASDBQyil-YYDMKv6hgM4S0AAWAEKIwohCNWCARIENDczMBjBQyCLuAEo86aIAzCCqIgDOEtAAFgBEgoIARABGAEqAlVBGAEiBAgBEAEoBDAB) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Thu, 12 Feb - Sun, 22 Feb LAX Los Angeles BOI Boise £427 Return found 3 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LAX,to:BOI,departure:12/02/2026TANYT&leg2=from:BOI,to:LAX,departure:22/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:426.20&airProductToken=AQpnCjIIwYIBEgQxOTg5GIu4ASDvuQEo6PuEAzDF_IQDOFZAAFgBagRNQUlOcghWMEZLWk5OMQoxCMGCARIENjIxORjvuQEgwUMoiP2EAzCe_oQDOFZAAVgBagRNQUlOcghWMEZLWk5OMQpnCjEIwYIBEgQ2NDUwGMFDIO-5ASiS7IUDMKTthQM4VkAAWAFqBE1BSU5yCFZVRktaTk4xCjIIwYIBEgQyNzg5GO-5ASCLuAEore6FAzCO74UDOFZAAVgBagRNQUlOcghWVUZLWk5OMRIKCAEQARgBKgJBQRgBIgQIARABKAIoAygEMAs) ## Find the cheapest month to fly from Columbus (CMH) to Boise (BOI) ### September is typically the cheapest month to fly From £160 - £439 per traveller. ## Expedia flights to Ontario Searching for cheap flights to Ontario? No travel company presents more choices than Expedia if you're looking to compare flights to Ontario. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Oregon. Expedia provides the cheapest flights to many destinations in Oregon and you may find even greater savings if you combine your flight with a hotel stay in Ontario. Expedia is the largest online travel agency which means that Expedia have access to cheap flights. So make sure you check Expedia regularly for these bargain flights because the cheapest airline tickets sell out fast. Expedia is not only free for everyone to use but it quick and easy to use. Find the lowest flight prices guaranteed and book directly through Expedia. Browse through hundreds of cheap flight offers to find the one that suits your budget by simply inputting your travel dates. Expedia will then find the cheapest flights to Ontario for that period and let you choose your preferred time and airline. If you need additional assistance, Expedia Customer Service representatives are available from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends. Our capable staff will be able to help you with any questions regarding your Ontario flight, or other booking questions that may arise. When you book flights with Expedia you can rest assured that you have booked the best flight at the lowest price. ## Frequently asked questions ### What is the name of Ontario's airport? ### What airport is best to fly into Ontario? ### How many airlines fly to Ontario? ### Which airlines fly to Ontario? ### How many nonstop flights are there to Ontario? ### Where are the most popular flights to Ontario departing from? ### How long is the flight to Ontario Airport? ### How to book the cheapest flight to Ontario? ### Do you have any tips for my flight to Ontario? > - A plane trip can be a comfortable experience if you pack the right things. First things first, you'll need toiletry items, such as deodorant and a toothbrush, a clean set of clothes and a few magazines. Next, find a spot in your carry-on bag for your phone and charger, any daily medications and perhaps a blow-up neck pillow as well. Lastly, don't forget to take your passport, travel documents and your bank cards. > > > Do not pack the following items in your hand luggage: > > > - Double-check that you don't have sharp objects (like a knife or scissors) hiding in one of the zippers of your hand luggage. Other banned items include explosive or flammable products, such as fuel and matches, and gels and liquids in containers with a capacity of more than 3.4 ounces (100 millilitres). > > > What to wear on a flight: > > > - Comfort should be your main concern when choosing what to wear on your flight. Loose, breathable clothing is a sensible option, as are flat, closed-toe shoes. > - Caused by sustained periods of immobility, deep vein thrombosis (DVT) is a blood clot condition that can affect passengers on long-distance flights. Lower your risks by staying hydrated, keeping your legs and feet moving and wearing compression socks to help your circulation. ### How to get through airport security fast when flying to Ontario? > - First things first. Your boarding pass and passport will need to be inspected by airport security. Have them close by so you don't have to dig around for them. > - The X-ray machine comes next. Remove anything on you that is likely to set off the alarm. This includes items like earphones or headphones, as well as heavy jackets or coats. They'll all need to go on the X-ray conveyor belt. > - Your electronic devices like laptops and phones will also have to go on a tray to be scanned. Don't worry, you'll be back online before you know it. > - Any gels or liquids, such as lip balm or cologne, that you want to take on board need to be in containers no larger than 3.4 ounces (100 millilitres). Also, everything must fit inside a quart-size (one litre), zip-lock bag. > - The right choice of footwear can save you several precious minutes. Hiking or heavy-style boots are often required to be removed and separately scanned. Slip-on sneakers are usually not. > - Sharp items such as knives and scissors are not allowed in the cabin. They'll be confiscated at security, so pack them safely away in your checked luggage. __Flights to Ontario information__ | Destination airport | Boise | | ----------------------------- | ----- | | Destination airport IATA code | BOI | | Destination city name | Boise | | Return price | £100 | ## Trending flights to Ontario Prices were available within the past 7 days and start at £58 for one-way flights and £100 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Lufthansa](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/LH.gif) Tue, 10 Mar - Tue, 17 Mar LHR London BOI Boise £558 Return found 1 day ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:BOI,departure:10/03/2026TANYT&leg2=from:BOI,to:LHR,departure:17/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:557.95&airProductToken=AQqtAQo0CMyQARIDOTAxGOuJASClBCianocDMPmehwM4S0AAWAFqCEVDT0xJR0hUcghLTFZIQVhCUQozCMyQARIDNDQ2GKUEIINpKLqfhwMwxKSHAzhLQAFYAWoIRUNPTElHSFRyCEtMVkhBWEJRCkAIzJABEgQ5MTk0GINpIMFDKNKlhwMw0aaHAzhLQAFYAWoIRUNPTElHSFRyCEtMVkhBWEJRegoI1YIBEgQ5MTk0CoUBCkAIzJABEgQ4NTM5GMFDIINpKJjyhwMwkPOHAzhLQABYAWoIRUNPTElHSFRyCEtMVkhBWEJRegoI1YIBEgQ4NTM5CkEIzJABEgQ3NzcyGINpIOuJASiD9IcDMKT4hwM4S0ABWAFqCEVDT0xJR0hUcghLTFZIQVhCUXoKCNWCARIENzc3MhIKCAIQARgCKgJMSBgBIgQIARABKAIoAygEMAs) \*Available to Expedia members.