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Cheap flights from San Diego to St. Louis from $88

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to St. Louis departing on 10/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from San Diego to St. Louis

Cheap round-trip flights

Southwest Logo
7:45 am - 4:00 pmSAN-STL
6h 15m1 stop
Southwest Logo
4:45 pm - 6:30 pmSTL-SAN
3h 45mnonstop
$180Southwest
Find Deal
Tue, Aug 19 - Wed, Aug 20
Southwest Logo
8:30 am - 3:55 pmSAN-STL
5h 25m1 stop
Southwest Logo
5:20 pm - 10:05 pmSTL-SAN
6h 45m1 stop
$185Southwest
Find Deal
Tue, Aug 19 - Tue, Aug 19
Frontier Logo
9:11 pm - 9:11 amSAN-STL
10h 00m1 stop
Frontier Logo
7:54 pm - 11:52 pmSTL-SAN
5h 58m1 stop
$194Frontier
Find Deal
Fri, Aug 29 - Mon, Sep 1
American Airlines Logo
2:57 pm - 11:51 pmSAN-STL
6h 54m1 stop
American Airlines Logo
5:27 am - 10:39 amSTL-SAN
7h 12m1 stop
$211American Airlines
Find Deal
Fri, Aug 29 - Mon, Sep 1
Frontier Logo
9:11 pm - 9:11 amSAN-STL
10h 00m1 stop
Frontier Logo
7:55 pm - 11:53 pmSTL-SAN
5h 58m1 stop
$214Frontier
Find Deal
Mon, Sep 1 - Fri, Sep 5
American Airlines Logo
4:20 pm - 12:16 amSAN-STL
5h 56m1 stop
American Airlines Logo
8:43 am - 1:56 pmSTL-SAN
7h 13m1 stop
$242American Airlines
Find Deal
Fri, Aug 8 - Tue, Aug 12
Delta Logo
10:30 pm - 9:41 amSAN-STL
9h 11m1 stop
Delta Logo
1:29 pm - 9:15 pmSTL-SAN
9h 46m1 stop
$264Delta
Find Deal
Tue, Aug 5 - Thu, Aug 7
 Logo
6:25 am - 9:07 amSAN-STL
24h 42m1 stop
 Logo
8:44 am - 2:15 pmSTL-SAN
7h 31m1 stop
Wed, Oct 8 - Sun, Oct 12
Delta Logo
9:40 pm - 9:40 amSAN-STL
10h 00m1 stop
Delta Logo
6:59 pm - 11:45 pmSTL-SAN
6h 46m1 stop
$279Delta
Find Deal
Fri, Oct 24 - Sun, Oct 26
 Logo
6:25 am - 9:07 amSAN-STL
24h 42m1 stop
 Logo
8:44 am - 2:15 pmSTL-SAN
7h 31m1 stop
Wed, Oct 22 - Sun, Oct 26

Frontier flights from San Diego to St. Louis

Our best Frontier deals on San Diego to St. Louis flight tickets
Frontier
Aug 29
SAN9:11 pmSan Diego
10h 00m
1 stop
STL9:11 amLambert-St Louis
Sep 1
STL7:54 pmLambert-St Louis
5h 58m
1 stop
SAN11:52 pmSan Diego
Frontier
Sep 1
SAN9:11 pmSan Diego
10h 00m
1 stop
STL9:11 amLambert-St Louis
Sep 5
STL7:55 pmLambert-St Louis
5h 58m
1 stop
SAN11:53 pmSan Diego
Frontier
Jul 10
SAN6:25 amSan Diego
10h 58m
1 stop
STL7:23 pmLambert-St Louis
Jul 14
STL7:29 pmLambert-St Louis
6h 23m
1 stop
SAN11:52 pmSan Diego

Southwest flights from San Diego to St. Louis

Our best Southwest deals on San Diego to St. Louis flight tickets
Southwest
Aug 19
SAN7:45 amSan Diego
6h 15m
1 stop
STL4:00 pmLambert-St Louis
Aug 20
STL4:45 pmLambert-St Louis
3h 45m
SAN6:30 pmSan Diego
Southwest
Aug 19
SAN8:30 amSan Diego
5h 25m
1 stop
STL3:55 pmLambert-St Louis
Aug 19
STL5:20 pmLambert-St Louis
6h 45m
1 stop
SAN10:05 pmSan Diego
Southwest
Aug 19
SAN8:40 amSan Diego
7h 00m
2 stops
STL5:40 pmLambert-St Louis
Aug 20
STL5:20 pmLambert-St Louis
6h 45m
1 stop
SAN10:05 pmSan Diego

See travel insights to St. Louis from

How to get the cheapest flight ticket from San Diego to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, August is the cheapest month to fly from San Diego to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $295. The month of February is another great option to travel to St. Louis, with average flight prices from San Diego averaging around $312.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $454. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $532. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from San Diego in the evening is the least expensive time of day to depart. momondo users have found prices as low as $198 when looking at flights departing in the evening. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $501 per ticket.

What is the cheapest San Diego to Lambert-St Louis flight route?

Fly from San Diego to Lambert-St Louis for the best San Diego - Lambert-St Louis flight prices

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

You are more likely to see cheaper flights to St. Louis from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $372 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from San Diego for as low as $275 on momondo.

What cabin class options are available on San Diego to Lambert-St Louis flights?

There are 1 cabin classes available to choose from on San Diego to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have San Diego to St. Louis flight prices changed over time?

As of July 2025, prices for San Diego to St. Louis flights are approximately 20% cheaper when compared to flights at the same time last year.

When to book flights from San Diego to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from San Diego to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Diego to St. Louis (SAN to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Diego to St. Louis

Best Price Found

$88

Fastest flight time

3h 30m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from San Diego in the past 72 hours is $88. The best round-trip flight deal from San Diego to St. Louis found on momondo in the last 72 hours is $180.
The fastest flight from San Diego to St. Louis takes 3h 30m
Direct flights go from San Diego to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

  • How far is San Diego to Lambert-St Louis by plane?

    Lambert-St Louis is 1560.0 mi away from San Diego. 3h 30m is a normal flight duration for this route.

  • When did momondo last update prices for flights from San Diego Airport to Lambert-St Louis Airport?

    Prices for flights from San Diego Airport to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from San Diego Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from San Diego Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Diego Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from San Diego to St. Louis?

  • What is the most popular airline from San Diego to St. Louis?


Best airlines flying from San Diego to St. Louis

Compare and see reviews for airlines that fly from San Diego to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $113Free CancellationRating
5.9
3,271 reviews
Search Frontier flights
DeltaPriceFrom $184Free CancellationRating
8.0
7,954 reviews
Search Delta flights
American AirlinesPriceFrom $246Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
8,842 reviews
Search United Airlines flights
SouthwestPriceFrom $343Free CancellationRating
8.0
4,252 reviews
Search Southwest flights
  • Southwest Flights From San Diego to St. Louis

    Southwest is one of the most popular airlines flying from San Diego to St. Louis, operating 10 flights/week on average for this route. A good Southwest flight deal for San Diego to St. Louis starts from $343 round-trip, up to an average price of $487. Our users have rated Southwest at 8.0/10.


Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Collinsville
Fenton
Farmington
O'Fallon
St. Peters
Alton
Wentzville
Festus
Glencoe
Clayton
Eureka
Edwardsville
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from San Diego to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Diego to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from San Diego to St. Louis with flexible booking policies on momondo?

Flights from San Diego to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from San Diego to St. Louis?

Once all potential San Diego to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from San Diego to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Diego to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.


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1 adult
Mon 7/14
Mon 7/21

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