Title: Cheap Flights from Tri-Cities to San Diego (TRI 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 Tri-Cities (TRI) 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 Tri-Cities, TN (TRI-Tri-Cities Regional) to San Diego Intl. Airport (SAN) - ![Delta](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:tri,to:san,departure:01/10/2025TANYT&leg2=from:san,to:tri,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![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:tri,to:san,departure:01/10/2025TANYT&leg2=from:san,to:tri,departure:08/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ## Plan, book, fly with confidence - ### Be in the know Get alerts if flight prices drop or rise\* - ### Book smarter Save up to 25% on select hotels after you book a flight\* - ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Find the cheapest month to fly from Blountville (TRI) to San Diego (SAN) ### July is typically the cheapest month to fly From £249 - £450 per traveller. Flight from Tri-Cities to San Diego route information | Origin airport | Tri-Cities Regional | | --- | --- | | Destination airport | San Diego Intl. | | Distance | 3175 km | ## Compare flights from Tri-Cities to San Diego easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Tri-Cities 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 Tri-Cities Regional 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 Tri-Cities Regional (TRI) to San Diego Intl. (SAN) The easiest way to view the best deals on flights from Tri-Cities 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 Tri-Cities Regional 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 Tri-Cities 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 Tri-Cities to San Diego flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Tri-Cities Regional 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 Tri-Cities Airport to San Diego Intl. Airport (SAN)? > Within the past 7 days on Expedia, for flights departing within the next year, the lowest price listed for a round-trip flight between Tri-Cities Regional Airport (TRI) and San Diego Intl. Airport (SAN) was . Cheap tickets don't last forever, so book yours today. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Tri-Cities Regional Airport (TRI) to SAN? > The majority of flights can be cancelled online, but every airline has different terms and conditions. If you do decide to cancel your flight, check out our [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033) and follow the instructions. ### How do I find cheap flights from TRI to SAN 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 TRI to San Diego Airport flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Tri-Cities Regional Airport (TRI) to SAN? > The flight distance between Tri-Cities Airport and San Diego Intl. Airport (SAN) is 3,200 kilometres. Sneak in a nap or get stuck into a book and the trip will zip on by. ### Which airlines fly direct from TRI to San Diego Intl. Airport (SAN)? > Currently, no airlines offer flights directly from Tri-Cities Regional Airport (TRI) to SAN. You'll have to book a flight with one or more stops. To get the best price and connections, lock in your fare well in advance. ### Are Tri-Cities Regional Airport (TRI) to San Diego Intl. Airport (SAN) flight tickets cheaper when they're purchased at the last minute? > Flight prices go up and down like a yo-yo, so not always. While last-minute flight deals between Tri-Cities Airport and SAN are of course possible, it also makes sense to keep track of prices well before you fly. In fact, some airlines announce their prices up to a year before the departure date. 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