Title: Cheap Flights from Trenton to San Diego (TTN to SAN) - Expedia.co.uk ![](https://images.trvl-media.com/place/3073/476a7863-1b66-47b5-9758-1dc7b3787493.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/3073/476a7863-1b66-47b5-9758-1dc7b3787493.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Trenton (TTN) to San Diego (SAN) - [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 Trenton–Mercer Airport (TTN) to San Diego Intl. Airport (SAN) - ![American Airlines](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:ttn,to:san,departure:29/09/2025TANYT&leg2=from:san,to:ttn,departure:06/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) ![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) Flight from Trenton to San Diego route information | Origin airport | Mercer | | --- | --- | | Destination airport | San Diego Intl. | | Distance | 3819 km | ## Compare flights from Trenton to San Diego easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Trenton to San Diego. Operating between them flights per day, airlines cover the route. And fly direct, getting you to San Diego Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Mercer to San Diego 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 Mercer (TTN) to San Diego Intl. (SAN) The easiest way to view the best deals on flights from Trenton to San Diego 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 Mercer to San Diego Intl. start at just and range up to .   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Trenton and San Diego - booking your flight during , the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your Trenton to San Diego flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Mercer to San Diego 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. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.   ## Frequently asked questions ### How much is a flight from Trenton–Mercer Airport to SAN? > Pack your bags, because round-trip flights between Mercer Airport (TTN) and SAN start from . That's based on airfares available within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to get 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 TTN to SAN? > This varies from airline to airline, as each has its own terms and conditions. Visit the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033), where you'll find instructions on how to cancel online. ### How do I find cheap flights from TTN to San Diego 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 TTN to San Diego Airport flights, you'll see a "no change fees" filter for you to select. ### How many hours is the flight from TTN to San Diego Airport? > Lasting around 8 hours and 23 minutes, the flight between Trenton–Mercer Airport and SAN is a good opportunity to do some last-minute trip planning. How about using some of this time to hone your itinerary for San Diego? ### How far is the flight from TTN to San Diego Intl. Airport (SAN)? > The flight distance from Mercer Airport (TTN) to SAN is 3,800 kilometres. Work your way through your travel song playlist or read a good book and the trip will whiz by. ### Which airlines fly direct from Mercer Airport (TTN) to San Diego Airport? > Flying nonstop between TTN and SAN isn't possible right now. However, you'll still be able to find a flight to San Diego with at least one stop. ### Are Trenton–Mercer Airport to San Diego Intl. Airport (SAN) flight tickets cheaper when they're purchased at the last minute? > Flight prices fluctuate, so there are no guarantees. While last-minute deals between TTN and San Diego Intl. Airport (SAN) are of course possible, it's also a good idea to keep an eye on prices well before you fly. In fact, some air carriers advertise their prices up to a year ahead of the departure date. Expedia is constantly updating the best bargains around, so keep checking and be ready to book when the price is low. ## Explore a world of travel with Expedia - Trending Routes - Trending Flights - Top Flights Destinations - Nearby Airports - Cheap Flights from Other Airports - Expedia's Latest Trends ### Top Routes to San Diego - [Exeter to San Diego (EXT - SAN)](https://expedia.co.uk/lp/flights/ext/san/exeter-to-san-diego) - [Londonderry to San Diego (LDY - SAN)](https://expedia.co.uk/lp/flights/ldy/san/londonderry-to-san-diego) - [Norwich to San Diego (NWI - SAN)](https://expedia.co.uk/lp/flights/nwi/san/norwich-to-san-diego) - [Bristol to San Diego (BRS - SAN)](https://expedia.co.uk/lp/flights/brs/san/bristol-to-san-diego) - [London to San Diego (LCY - SAN)](https://expedia.co.uk/lp/flights/lcy/san/london-to-san-diego) - [Leeds to San Diego (LBA - SAN)](https://expedia.co.uk/lp/flights/lba/san/leeds-to-san-diego) - [Edinburgh to San Diego (EDI - SAN)](https://expedia.co.uk/lp/flights/edi/san/edinburgh-to-san-diego) - [Hull to San Diego (HUY - SAN)](https://expedia.co.uk/lp/flights/huy/san/hull-to-san-diego) - [Inverness to San Diego (INV - SAN)](https://expedia.co.uk/lp/flights/inv/san/inverness-to-san-diego) - [Birmingham to San Diego (BHX - SAN)](https://expedia.co.uk/lp/flights/bhx/san/birmingham-to-san-diego) - [Newcastle to San Diego (NCL - SAN)](https://expedia.co.uk/lp/flights/ncl/san/newcastle-to-san-diego) - [London to San Diego (LHR - SAN)](https://expedia.co.uk/lp/flights/lhr/san/london-to-san-diego) ### Top Routes to San Diego - [British Airways Lerwick to San Diego](https://expedia.co.uk/lp/flight-routes/british-airways-from-sumburgh-to-san-diego-intl/ba/lsi/san) - [KLM Durham to San Diego](https://expedia.co.uk/lp/flight-routes/klm-from-teesside-intl-to-san-diego-intl/kl/mme/san) - [Air France Leeds to San Diego](https://expedia.co.uk/lp/flight-routes/air-france-from-leeds-bradford-to-san-diego-intl/af/lba/san) - [British Airways Edinburgh to San Diego](https://expedia.co.uk/lp/flight-routes/british-airways-from-edinburgh-to-san-diego-intl/ba/edi/san) - [KLM Birmingham to San Diego](https://expedia.co.uk/lp/flight-routes/klm-from-birmingham-to-san-diego-intl/kl/bhx/san) - [British Airways Newcastle to San Diego](https://expedia.co.uk/lp/flight-routes/british-airways-from-newcastle-intl-to-san-diego-intl/ba/ncl/san) - [British Airways London to San Diego](https://expedia.co.uk/lp/flight-routes/british-airways-from-heathrow-to-san-diego-intl/ba/lhr/san) ### Top Flight Destinations - [Flights to Las Vegas](https://expedia.co.uk/Cheap-Flights-To-Las-Vegas.d178276.Travel-Guide-Flights) - [Flights to New York](https://expedia.co.uk/Cheap-Flights-To-New-York.d178293.Travel-Guide-Flights) - [Flights to Orlando](https://expedia.co.uk/Cheap-Flights-To-Orlando.d178294.Travel-Guide-Flights) - [Flights to Chicago](https://expedia.co.uk/Cheap-Flights-To-Chicago.d178248.Travel-Guide-Flights) - [Flights to San Diego](https://expedia.co.uk/Cheap-Flights-To-San-Diego.d3073.Travel-Guide-Flights) - [Flights to San Francisco](https://expedia.co.uk/Cheap-Flights-To-San-Francisco.d178305.Travel-Guide-Flights) - [Flights to Los Angeles](https://expedia.co.uk/Cheap-Flights-To-Los-Angeles.d178280.Travel-Guide-Flights) - [Flights to Boston](https://expedia.co.uk/Cheap-Flights-To-Boston.d178239.Travel-Guide-Flights) - [Flights to Miami](https://expedia.co.uk/Cheap-Flights-To-Miami.d178286.Travel-Guide-Flights) - [Flights to Houston](https://expedia.co.uk/Cheap-Flights-To-Houston.d178265.Travel-Guide-Flights) - [Flights to Pigeon Forge](https://expedia.co.uk/Cheap-Flights-To-Pigeon-Forge.d8264.Travel-Guide-Flights) - [Flights to Nashville](https://expedia.co.uk/Cheap-Flights-To-Nashville.d178291.Travel-Guide-Flights) - [Flights to Myrtle Beach](https://expedia.co.uk/Cheap-Flights-To-Myrtle-Beach.d601685.Travel-Guide-Flights) - [Flights to Atlanta](https://expedia.co.uk/Cheap-Flights-To-Atlanta.d178232.Travel-Guide-Flights) - [Flights to San Antonio](https://expedia.co.uk/Cheap-Flights-To-San-Antonio.d178303.Travel-Guide-Flights) - [Flights to Denver](https://expedia.co.uk/Cheap-Flights-To-Denver.d178254.Travel-Guide-Flights) - [Flights to Honolulu](https://expedia.co.uk/Cheap-Flights-To-Honolulu.d1488.Travel-Guide-Flights) - [Flights to Gatlinburg](https://expedia.co.uk/Cheap-Flights-To-Gatlinburg.d7474.Travel-Guide-Flights) - [Flights to Panama City Beach](https://expedia.co.uk/Cheap-Flights-To-Panama-City-Beach.d8021.Travel-Guide-Flights) - [Flights to Atlantic City](https://expedia.co.uk/Cheap-Flights-To-Atlantic-City.d602179.Travel-Guide-Flights) Trenton Airports #### Newark Liberty Intl. Airport [Newark Liberty Intl. Airport to San Diego](https://expedia.co.uk/lp/flights/ewr/san/newark-liberty-intl-airport-to-san-diego) £182.20 #### Philadelphia [Philadelphia Intl. to San Diego](https://expedia.co.uk/lp/flights/phl/san/philadelphia-to-san-diego) £220.40 ### Nearby Airports - [Princeton Airport (PCT)](https://expedia.co.uk/lp/airports/pct/flights-from-princeton-airport) - [Northeast Philadelphia Airport (PNE)](https://expedia.co.uk/lp/airports/pne/flights-from-northeast-philadelphia-airport) - [Wings Field Airport (BBX)](https://expedia.co.uk/lp/airports/bbx/flights-from-wings-field-airport) - [Philadelphia Intl. Airport (PHL)](https://expedia.co.uk/lp/airports/phl/flights-from-philadelphia-intl-airport) - [Monmouth Executive Airport (BLM)](https://expedia.co.uk/lp/airports/blm/flights-from-monmouth-executive-airport) - [Linden Airport (LDJ)](https://expedia.co.uk/lp/airports/ldj/flights-from-linden-airport) - [Lehigh Valley Intl. Airport (ABE)](https://expedia.co.uk/lp/airports/abe/flights-from-lehigh-valley-intl-airport) - [Newark Liberty Intl. Airport Airport (EWR)](https://expedia.co.uk/lp/airports/ewr/flights-from-newark-liberty-intl-airport-airport) - [Essex County Airport (CDW)](https://expedia.co.uk/lp/airports/cdw/flights-from-essex-county-airport) - [Atlantic City Intl. 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