Title: CA $445 Cheap Alaska Airlines fights from St. Louis to San Diego - Expedia.ca ![](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) # CA $445 Cheap Alaska Airlines fights from St. Louis (STL) to San Diego (SAN) [View CA $445 flight on Mon, Nov 3, 2025](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:STL,to:SAN,departure:03/11/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:444.60&airProductToken=AQpeCi0IwaYBEgM0NzMY8lwgkgEojIv8AjCdjfwCOFhAAFgBagJTVnIIU0g3T0FKQk4KLQjBpgESAzYyMRiSASCSaCimjvwCMNeP_AI4WEABWAFqAlNWcghTSDdPQUpCThIKCAEQARgBKgJBUxgBIgQIARABKAIoAygEMAE) - [Roundtrip](?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 ![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 30% 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.ca/login) ## Alaska Airlines flights from St. Louis to San Diego (STL→SAN) Prices were available within the past 7 days and start at CA $445 for one-way flights and CA $953 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Fri, Dec 26 - Fri, Jan 9 STL St. Louis SAN San Diego CA $953 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:SAN,departure:26/12/2025TANYT&leg2=from:SAN,to:STL,departure:09/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:952.60&airProductToken=AQpiCi8IwaYBEgQ2MTkzGPJcIKOxASjs5IADMOTlgAM4TUAAWAFqAlBNcghNMEFIWk5OMQovCMGmARIENDExMhijsQEgkmgo4OaAAzCf6IADOE1AAVgBagJQTXIITTBBSFpOTjEKXgotCMGmARIDNjg1GJJoIJIBKISAggMwxIGCAzhPQABYAWoCTUFyCE9IMk9BVU1OCi0IwaYBEgMzODgYkgEg8lwovIKCAzCjhIIDOE9AAVgBagJNQXIIT0gyT0FVTU4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAB) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Fri, Dec 26 - Fri, Jan 9 STL St. Louis SAN San Diego CA $970 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:SAN,departure:26/12/2025TANYT&leg2=from:SAN,to:STL,departure:09/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:969.80&airProductToken=AQpiCi8IwaYBEgQ2MTkzGPJcIKOxASjs5IADMOTlgAM4TUAAWAFqAlBNcghNMEFIWk5OMQovCMGmARIENDExMhijsQEgkmgo4OaAAzCf6IADOE1AAVgBagJQTXIITTBBSFpOTjEKYgovCMGmARIENDMyMRiSaCCjsQEouf6BAzDw_4EDOE5AAFgBagJQTXIIU1ZBWlpOTTMKLwjBpgESBDQxMDEYo7EBIPJcKLKAggMwloGCAzhOQAFYAWoCUE1yCFNWQVpaTk0zEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwAQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Fri, Dec 26 - Fri, Jan 9 STL St. Louis SAN San Diego CA $1,055 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:SAN,departure:26/12/2025TANYT&leg2=from:SAN,to:STL,departure:09/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1054.70&airProductToken=AQpgCi4IwaYBEgQ0NzY0GPJcIK4cKPDegAMwyt-AAzhMQABYAWoCUE1yCE03QUlaTk4xCi4IwaYBEgQxNDcwGK4cIJJoKI_ggAMwr-KAAzhNQAFYAWoCUE1yCE03QUlaTk4xCl4KLQjBpgESAzY4NRiSaCCSASiEgIIDMMSBggM4T0AAWAFqAk1BcghPSDJPQVVNTgotCMGmARIDMzg4GJIBIPJcKLyCggMwo4SCAzhPQAFYAWoCTUFyCE9IMk9BVU1OEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwAQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Fri, Dec 26 - Fri, Jan 9 STL St. Louis SAN San Diego CA $1,068 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:SAN,departure:26/12/2025TANYT&leg2=from:SAN,to:STL,departure:09/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1067.60&airProductToken=AQpiCi8IwaYBEgQ2MTkzGPJcIKOxASjs5IADMOTlgAM4TUAAWAFqAlBNcghNMEFIWk5OMQovCMGmARIENDExMhijsQEgkmgo4OaAAzCf6IADOE1AAVgBagJQTXIITTBBSFpOTjEKYgovCMGmARIENjg1MRiSaCCjsQEo0IGCAzCIg4IDOFZAAFgBagJQTXIIVlZBSVpOTTEKLwjBpgESBDQxMjEYo7EBIPJcKMSDggMwq4SCAzhWQAFYAWoCUE1yCFZWQUlaTk0xEgoIARABGAEqAkFTGAEiBAgBEAEoAigDKAQwAQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Fri, Dec 26 - Fri, Jan 9 STL St. Louis SAN San Diego CA $1,072 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:SAN,departure:26/12/2025TANYT&leg2=from:SAN,to:STL,departure:09/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1071.90&airProductToken=AQpgCi4IwaYBEgQ0NzY0GPJcIK4cKPDegAMwyt-AAzhMQABYAWoCUE1yCE03QUlaTk4xCi4IwaYBEgQxNDcwGK4cIJJoKI_ggAMwr-KAAzhNQAFYAWoCUE1yCE03QUlaTk4xCmAKLgjBpgESBDE0OTUYkmggrhwooP6BAzCtgIIDOFFAAFgBagJQTXIIUVZBWlpOTTMKLgjBpgESBDY1MjgYrhwg8lwouYGCAzCOgoIDOEdAAVgBagJQTXIIUVZBWlpOTTMSCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAB) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Fri, Dec 26 - Fri, Jan 9 STL St. Louis SAN San Diego CA $1,170 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:SAN,departure:26/12/2025TANYT&leg2=from:SAN,to:STL,departure:09/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1169.70&airProductToken=AQpgCi4IwaYBEgQ0NzY0GPJcIK4cKPDegAMwyt-AAzhMQABYAWoCUE1yCE03QUlaTk4xCi4IwaYBEgQxNDcwGK4cIJJoKI_ggAMwr-KAAzhNQAFYAWoCUE1yCE03QUlaTk4xCmIKLwjBpgESBDQ2NDcYkmggo7EBKN-AggMwlIKCAzhOQABYAWoCUE1yCFZWQUlaTk0xCi8IwaYBEgQ0MTIxGKOxASDyXCjEg4IDMKuEggM4TkABWAFqAlBNcghWVkFJWk5NMRIKCAEQARgBKgJBUxgBIgQIARABKAIoAygEMAE) Flight from St. Louis to San Diego (STL - SAN) route information | Origin airport | Lambert-St. Louis Intl. | | --- | --- | | Destination airport | San Diego Intl. | | Airlines serving | Alaska Airlines, American Airlines, Delta, United | | Popular airline | American Airlines | | Distance | 2487 km | | Average flight time | 2 hours 5 mins | ## Frequently asked questions ### How much is an Alaska Airlines flight from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)? > Finding cheap one-way Alaska Airlines flights from STL to SAN from CA $445 on Expedia couldn't be simpler — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from CA $953 for your next exciting vacation.\**\*These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.* ### What is the cheapest month to fly from STL to SAN with Alaska Airlines? > January is one of the cheapest months to get away to San Diego with Alaska Airlines. You could also find great prices on one-way and return fares in November. ### Does Alaska Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)? > To find out if there's a direct trip from STL to SAN with Alaska Airlines or another airline, select the "Nonstop" filter when browsing for tickets. ### What airports does Alaska Airlines fly into in San Diego? > Alaska Airlines flights from Lambert-St. Louis Intl. Airport (STL) to San Diego touch down at San Diego Intl. Airport (SAN). This is the main entry point to this city. ### Can I change or cancel my Alaska Airlines flight from Lambert-St. Louis Intl. Airport (STL) to San Diego Intl. Airport (SAN)? > Typically, you can reschedule or cancel your flight, although additional fees may apply if you made your booking over 24 hours ago. Need to keep your options open? Use Expedia's "Changes included" or "No cancel fee" filter to find flights that won't charge you extra if you have to revise your plans. To make changes, visit "[Trips](https://www.expedia.ca/trips)," select your flight and click on "Manage Booking" for more details. ## Explore a world of travel with Expedia \*Available to Expedia members.