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STL - SAN

Find cheap flights from St. Louis to San Diego from $56

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to San Diego departing on 6/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Tue 6/4
Tue 6/11

Search hundreds of travel sites at once for deals on flights to San Diego

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Diego.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Diego.
In the last 7 days travelers have searched 42,830,901 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from St. Louis to San Diego (STL-SAN)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to San Diego that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
1:55 pm - 10:27 pmSTL-SAN
10h 32m1 stop
9:19 pm - 1:05 pmSAN-STL
13h 46m1 stop
$90Spirit Airlines
Find Deal
Wed, Jun 12 - Tue, Jun 18
1:55 pm - 8:30 pmSTL-SAN
8h 35m1 stop
9:19 pm - 1:05 pmSAN-STL
13h 46m1 stop
$91Spirit Airlines
Find Deal
Wed, Jun 12 - Tue, Jun 18
11:36 am - 10:25 pmSTL-SAN
12h 49m1 stop
2:52 pm - 10:07 pmSAN-STL
5h 15m1 stop
Wed, May 29 - Wed, Jun 5
8:04 pm - 7:04 amSTL-SAN
13h 00m1 stop
9:12 pm - 10:46 amSAN-STL
11h 34m1 stop
Sat, May 18 - Tue, May 21
11:39 am - 9:14 amSTL-SAN
23h 35m2 stops
9:12 pm - 10:46 amSAN-STL
11h 34m1 stop
$113Spirit Airlines
Find Deal
Sat, May 18 - Tue, May 21
8:04 pm - 7:04 amSTL-SAN
13h 00m1 stop
9:12 pm - 10:46 amSAN-STL
11h 34m1 stop
Sat, May 25 - Tue, May 28
11:06 pm - 7:10 amSTL-SAN
10h 04m1 stop
2:52 pm - 10:07 pmSAN-STL
5h 15m1 stop
$123Frontier
Find Deal
Thu, May 30 - Wed, Jun 5
8:04 pm - 7:04 amSTL-SAN
13h 00m1 stop
11:30 am - 10:32 pmSAN-STL
9h 02m1 stop
$129Frontier
Find Deal
Sat, May 18 - Sun, May 26
8:04 pm - 9:25 pmSTL-SAN
27h 21m1 stop
10:28 am - 9:59 pmSAN-STL
9h 31m1 stop
$138Frontier
Find Deal
Mon, Jun 3 - Mon, Jun 10
7:23 pm - 10:14 amSTL-SAN
16h 51m1 stop
8:21 pm - 10:13 amSAN-STL
11h 52m1 stop
$141Frontier
Find Deal
Thu, May 16 - Sat, May 18

Flights from St. Louis to San Diego - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to San Diego to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to San Diego?

The average price of all flights from St. Louis to San Diego clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from St. Louis to San Diego, look for departures on Tuesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from San Diego, Wednesday is the cheapest day to fly and Monday is the most expensive.

What is the cheapest month to fly from St. Louis to San Diego?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to San Diego, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to San Diego is April, where tickets cost $235 on average. On the other hand, the most expensive months are December and November, where the average cost of tickets is $458 and $442 respectively.

How far in advance should I book a flight from St. Louis to San Diego?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to San Diego, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to San Diego, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 19 days before departure.

Which airlines provide the cheapest flights from St. Louis to San Diego?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from St. Louis to San Diego found on KAYAK was with Spirit Airlines for $56. Spirit Airlines proposed a round-trip connection from $90 and Frontier from $123.

How many flights are there between St. Louis and San Diego per day?

Each day, there are between 1 and 4 nonstop flights that take off from St. Louis and land in San Diego, with an average flight time of 3h 51m. The most common departure time is 1:00 pm and most flights take off in the morning. Each week, there are 17 flights. The most frequent day of departure is Wednesday, when 24% of all weekly flights depart. The fewest flights depart on a Saturday.

What’s the earliest departure time from St. Louis to San Diego?

Early birds can take the earliest flight from St. Louis at 6:15 am and will be landing in San Diego at 8:15 am.

What’s the latest departure time from St. Louis to San Diego?

If you prefer to fly at night, the latest flight from St. Louis to San Diego jets off at 6:05 pm and lands at 7:50 pm.

Good to know

Low season

January

High season

August

Cheapest flight

$56
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 2% increase in price.
Flight from St. Louis to San Diego

When to book flights from St. Louis to San Diego

Are your dates flexible? Find out the best times to travel from St. Louis to San Diego based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to San Diego

  • How can I fly from STL to SAN?

    Southwest operates a non-stop flight from STL to SAN. Airlines such as Frontier, United Airlines, Delta, and American Airlines operate one-stop flights from STL to SAN. Some of the layover cities include Dallas (DFW), Denver (DEN), Minneapolis (MSP), Las Vegas (LAS), and Houston (IAH). American Airlines and United Airlines are among the carriers that operate flights from STL to SAN with two layovers.

  • Does STL have nursing rooms?

    Yes. STL has installed Lactation Suites in Gates A10, C9, and E33. Each unit has a comfortable club chair with a full back and a movable arm table, a sink with counter space, and power outlets.

  • Does STL have a USO?

    Yes. There are two USO lounges at STL, one in Terminal 1 at Baggage Claim M6. This lounge is open 24h. The other is in Terminal 2 near Exit 11 by Baggage Claim, open from 7 am until 6 pm. Some amenities in these lounges include showers, a sleeping area with beds, a library, a children's play area, snacks and beverages, computers, Wi-Fi, TV, comfortable seating, and more.

  • How do I get from SAN into downtown San Diego?

    From Lindbergh Field at Terminal 1 at STL, you can catch a San Diego Metro Transit bus #992 into downtown San Diego at Broadway and State Street. This trip takes about 18min and buses depart about every 20min. Taxis and shuttles can get you from STL to downtown San Diego in less than half the time but at about twice the price of a bus.

  • What is the cheapest flight from St. Louis to San Diego?

    In the last 3 days, the lowest price for a flight from St. Louis to San Diego was $56 for a one-way ticket and $90 for a round-trip.

  • Do I need a passport to fly between St. Louis and San Diego?

    A passport is not required to fly from St. Louis to San Diego.

  • Which aircraft models fly most regularly from St. Louis to San Diego?

    We unfortunately don’t have that data for this specific route.

  • On which days can I fly direct from St. Louis to San Diego?

    There are nonstop flights from St. Louis to San Diego on a daily basis.

  • Which is the best airline for flights from St. Louis to San Diego, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to San Diego are Delta and Alaska Airlines. With an average price for the route of $382 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $718 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from St. Louis to San Diego?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to San Diego.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to San Diego?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Diego from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to San Diego?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Diego with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SAN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to San Diego?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Diego from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from STL to San Diego

  • The St. Louis Lambert International Airport (STL) is a hub for Cape Air and Air Choice One. San Diego International Airport (SAN) is a focus city for Southwest Airlines and Alaskan.
  • You can park your car at STL long-term before your trip to SAN at B Lot and D Lot. Free shuttles run every 10min between these lots and the terminals. There are garages and surface lots closer to the terminals, within walking distance, but these parking options are more expensive. You can check the STL homepage to see what availability there is in each of the lots.
  • At the Baggage Claim in Terminals 1 and 2 at SAN, passengers can take advantage of Traveler’s Aid if they need to. This non-profit facility is open from 8 am until 11 pm, and it provides aid to travelers who are stranded or distressed. Traveler’s Aid can assist you with issues such as transportation assistance, emergency housing, lost or stolen money, and more.
  • STL has a total of six animal relief areas for travelers who have a pet or service animal with them. The animal relief stations in the terminal can be found at Gates E4, A16, C24, and E40. The relief areas that are outside can be accessed through Exit 6 in Terminal 1 and Exit 15 in Terminal 2.
  • STL has an airport and travel-themed kids' play area, the St Louis International Playport, at Gate 2 on Concourse C. At this indoor playground, kids can play with a kid-sized plane, car, van, and truck. There is also a control tower with a sliding board, a pretend luggage conveyor belt, a pretend security area with a pretend X-ray machine, and a play-car rental counter.
See more tips

Prefer to fly non-stop from St. Louis to San Diego?

Find which airlines fly direct from Lambert-St Louis to San Diego, which days they fly and book direct flights.

Nonstop departures

Lambert-St Louis to San Diego

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Nonstop returns

San Diego to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from St. Louis to San Diego

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to San Diego. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to San Diego? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10826 reviews
7.4Food
8.2Boarding
7.9Comfort
8.0Entertainment
8.6Crew
Airline reviews

There was a loud squeaky sound the whole time we were flying.

6.0 GoodEliza, Apr 2024SAN - LAX
Read more about Delta reviews

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

Really impressive staff at airport and on plane, especially given how busy it was

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

The WiFi didn’t work and the seats are too close together. Very uncomfortable.

So so. Terrible aircraft choice for that leg of the flight.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

On time every leg of the journey and exceptional staff at counter, gate, and on board. I haven’t travelled in US for a long time and was genuinely surprised how pleasant this was.

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

Too many fees (but that seems to apply to all airlines nowadays)

The CX617 from HK to BKK was delayed more than 1.5 hours.

American Airlines continues to price it can provide the least comfortable passenger experience in the air. This legacy carrier rivals the budgets for both terrible seats and inadequate amenities. I am a 5’7” woman who is not wider than a coach seat (even on these narrow bodied aircraft). My 3.5 hour flight was terribly uncomfortable because the leg room is inadequate (my knees hit the seat on front of me even when it was not reclined); the seat barely reclines; and the foam padding is worn thin to the extent one can feel the metal supports of the seat. Add to this the fact that the aisle is super narrow, so that the drink cart literally scrapes the arm rest of the aisle seat. It’s basically torture.

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

They attended to my needs as I couldn't walk and they provided a wheelchair for me.q

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

They charged me 212.00 for a heavy check in bag at the gate. The pricing and process was so confusing - as if it was designed to purposefully gouge customers who need to board plane. That experience combined with the outrageous price charged will prevent me from ever flying Spirit again. And I’ll be sure to tell the story to anyone who cares to hear.

The text told me it was changed to Terminal E and Gate D5. But with no one on site to ask questions there was confusion on where to go as all the gates were E's. Then we took the skyline to the D area. We left to get something to eat. No announcement was made but my daughter happened to asked and they told her our gate was moved to D12. I will not fly Spirit again.

The agent at the check in desk was absolutely rude. The rest of the team after that was good, but the check in process at LAS was miserable. The woman at the desk spoke like we were stupid and was rude throughout the process.

Its so random that they only allow 40 pounds on checked bags when all airlines take 55. They then charge you for each 10 extra pounds, so my checked suitcase was $130 and the flight $30 ... its like whattt, im for sure not traveling with Spirit again

So bad. The check in process was laborious and the check in agent didn't seem to know how to manage the process efficiently and was confused about how to check in my son's sports equipment. The baggage fees were outrageous and so expensive. $90 for a carry on bag? And $200 additional for 2 check ins. The security lines were insanely long and the terminal was not very nice in the Spirit area. $5 for a water on board. It was my first and last time flying Spirit - I tried to save $ by flying them due to the accommodating schedule but I should have paid for Southwest, because it would've actually ended up less expensive due to the free bags with Southwest. There were no charging ports on the airplane, no wifi and really uncomfortable seating. The flight crew were great though, courteous and efficient in their boarding. Flight was delayed 1 hour, but we made up 15 minutes in flight.

My experience was better than expected. What I did find not so great was the seats. Very little room, they did not recline and the tray table was the size of a post card. There was no food to try, just standard snacks that you had to pay for and I don’t know of any entertainment. I would fly again even though everything was an upcharge. Flight was on time with little disturbance

thy don't even ofer water we have to buy it for $4.49 and paid for our cary on bags $100 each we never will fly in this company again.

Super cool and laid back, three lovely ladies. Couldn’t ask for better service.

It was fine. Boarding was a little rude. On flight staff was great. The cost to purchase everything was a bit annoying but I get that's the business model.

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

The boarding time. I was in Section 1 the lady in charge just let people in section 3 without see us. Make a line , I have to step out and ask her. We were in the line and she just take my ticket and that’s it, so if I don’t ask her she could leave us at the end! We paid more for that privilege and. She doesn’t care….

See my previous comment which is mostly about our flight from Phoenix to SFO

The check in at the airport was awful. Told I need to pay for a bag. The item was taken at screening. I went back to get my $ back and they gave me a coupon with a QR code that doesn’t work. Worst costumer service ever!!!!!

Book cheap flights from St. Louis to San Diego

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to San Diego found on KAYAK in the last 72 hours.
6/5Wed
1 stopSpirit Airlines
10h 32mSTL-SAN
$56
5/15Wed
1 stopSpirit Airlines
12h 49mSTL-SAN
$62
6/5Wed
2 stopsSpirit Airlines
27h 41mSTL-SAN
$75
5/12Sun
1 stopFrontier
10h 55mSTL-SAN
$76
7/11Thu
1 stopFrontier
6h 17mSTL-SAN
$121
7/13Sat
1 stopDelta
8h 12mSTL-SAN
$123
9/21Sat
2 stopsAlaska Airlines
13h 10mSTL-SAN
$200
7/13Sat
2 stopsUnited Airlines
30h 07mSTL-SAN
$353
7/11Thu
2 stopsUnited Airlines
13h 17mSTL-SAN
$389
7/11Thu
2 stopsAlaska Airlines
11h 38mSTL-SAN
$406

Search by stops

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Last minute flights from St. Louis to San Diego

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to San Diego that are departing in the next 10 days.
5/8Wed
multi-stop
10h 46mSTL-SAN
5/19Sun
multi-stop
13h 54mSAN-STL
$221
5/7Tue
multi-stopFrontier
10h 35mSTL-SAN
5/11Sat
multi-stopFrontier
11h 04mSAN-STL
$229
5/10Fri
multi-stopFrontier
16h 57mSTL-SAN
5/16Thu
multi-stopFrontier
8h 58mSAN-STL
$249
5/10Fri
multi-stopFrontier
16h 57mSTL-SAN
5/12Sun
multi-stopFrontier
24h 25mSAN-STL
$282
5/7Tue
multi-stopFrontier
10h 35mSTL-SAN
5/10Fri
multi-stopFrontier
10h 46mSAN-STL
$328
5/6Mon
multi-stopSpirit Airlines
19h 40mSTL-SAN
5/10Fri
multi-stopSpirit Airlines
5h 32mSAN-STL
$424
5/10Fri
multi-stopSpirit Airlines
9h 16mSTL-SAN
5/12Sun
multi-stopSpirit Airlines
30h 59mSAN-STL
$452
5/9Thu
multi-stopUnited Airlines
13h 52mSTL-SAN
5/13Mon
multi-stopUnited Airlines
8h 37mSAN-STL
$646
5/8Wed
multi-stopUnited Airlines
11h 29mSTL-SAN
5/19Sun
multi-stopUnited Airlines
12h 02mSAN-STL
$672
5/9Thu
multi-stopAlaska Airlines
13h 02mSTL-SAN
5/13Mon
multi-stopAlaska Airlines
13h 17mSAN-STL
$730

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St. Louis - San Diego Flights

Departure:

St. Louis (STL)United States

Destination:

San Diego (SAN)United States

Return flight deals:

San Diego - St. Louis

Cabin classes: