Cheap flights from St. Louis to San Diego (STL - SAN) from $55

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/15. 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.
STL — SAN
Mar 24 — Mar 311

The best prices from Lambert-St Louis to San Diego are usually found in September or January, booked 28 days in advance, depart on a Tuesday or Saturday and return on a Wednesday

Cheap flight deals from St. Louis to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 19, 2024.

Popular in

March

Cheapest in

September

Round-trip from

$288

One-way from

$131
High demand for flights, 25% potential price rise
Best time to find cheap flights, 29% potential price drop
From Lambert-St Louis to San Diego
One-way flight from Lambert-St Louis to San Diego

What is the cheapest day to fly round-trip from St. Louis to San Diego?

Flying to your destination on a Thursday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to San Diego. Check prices with Cheapflights to find a great deal for your trip.

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

Travelers have found it’s best to book a flight 29 days in advance to save up to 71% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 29 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to San Diego 1-2 weeks in advance for as low as $258, or $456 for flights within the next 24 hours.

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

The best pricing can be found in the month of September. Prices to San Diego from St. Louis average $422. You can even find prices in September for less than $422, as users have found deals to San Diego from as low as $149. The month of March appears to be one of the more expensive times to travel to San Diego from St. Louis. Flying in the targeted month can save you up to 32%.

When is the cheapest time to fly from St. Louis to San Diego (STL - SAN)?

Unlike at noon, when flights are generally more expensive, you can save up to 49% on flights from St. Louis to San Diego by exploring options for tickets in the evening.

Cheap Frontier flights from St. Louis to San Diego

Explore cheap flight options specifically provided by Frontier for the route between St. Louis and San Diego. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Take a peek at the cheapest Frontier flights we've detected traveling from St. Louis to San Diego. Come back soon if you're not finding the exact deal you're looking for.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Mon 4/229:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$97
Thu 4/1110:56 pmSTL - SAN
1 stop10h 58mFrontier
Sat 4/139:14 pmSAN - STL
1 stop11h 04mFrontier
Deal found 3/17$98
Sun 4/77:37 pmSTL - SAN
1 stop26h 38mFrontier
Wed 4/109:32 pmSAN - STL
1 stop22h 34mFrontier
Deal found 3/18$118
Tue 4/2310:59 pmSTL - SAN
1 stop10h 35mFrontier
Mon 4/299:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$119
Wed 4/107:51 pmSTL - SAN
1 stop14h 03mFrontier
Mon 4/159:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/18$122
Thu 4/2510:59 pmSTL - SAN
1 stop10h 55mFrontier
Sat 5/258:41 pmSAN - STL
1 stop11h 37mFrontier
Deal found 3/18$125
Wed 4/38:45 pmSTL - SAN
1 stop13h 32mFrontier
Tue 4/93:35 pmSAN - STL
1 stop16h 12mFrontier
Deal found 3/18$128
Wed 4/107:51 pmSTL - SAN
1 stop21h 38mFrontier
Sun 4/147:53 amSAN - STL
1 stop24h 25mFrontier
Deal found 3/18$133
Sat 3/307:04 pmSTL - SAN
1 stop15h 28mFrontier
Tue 4/25:56 pmSAN - STL
1 stop14h 27mFrontier
Deal found 3/16$142

Cheap Spirit Airlines flights from St. Louis to San Diego

Explore cheap flight options specifically provided by Spirit Airlines for the route between St. Louis and San Diego. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
To aid your search, here are some of the cheapest Spirit Airlines flights we've found from St. Louis to San Diego. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Tue 4/162:35 pmSTL - SAN
3 stops23h 20mSpirit Airlines
Tue 4/238:00 pmSAN - STL
1 stop12h 43mSpirit Airlines
Deal found 3/17$186
Tue 4/162:35 pmSTL - SAN
3 stops23h 20mSpirit Airlines
Tue 4/236:26 pmSAN - STL
1 stop14h 17mSpirit Airlines
Deal found 3/17$193
Mon 4/155:02 pmSTL - SAN
1 stop8h 46mSpirit Airlines
Mon 4/226:26 pmSAN - STL
3 stops17h 18mSpirit Airlines
Deal found 3/17$218
Tue 4/162:35 pmSTL - SAN
3 stops30h 24mSpirit Airlines
Tue 4/236:40 amSAN - STL
2 stops26h 03mSpirit Airlines
Deal found 3/17$229
Thu 4/117:30 pmSTL - SAN
3 stops18h 25mSpirit Airlines
Tue 4/168:00 pmSAN - STL
1 stop12h 43mSpirit Airlines
Deal found 3/17$252
Thu 4/117:30 pmSTL - SAN
3 stops18h 25mSpirit Airlines
Tue 4/166:40 amSAN - STL
2 stops26h 03mSpirit Airlines
Deal found 3/17$271
Wed 4/1011:33 amSTL - SAN
1 stop9h 26mSpirit Airlines
Mon 4/1511:37 amSAN - STL
3 stops24h 07mSpirit Airlines
Deal found 3/18$275
Fri 4/122:48 pmSTL - SAN
1 stop10h 25mSpirit Airlines
Mon 4/156:26 pmSAN - STL
3 stops17h 18mSpirit Airlines
Deal found 3/17$307
Sun 3/247:48 pmSTL - SAN
3 stops29h 39mSpirit Airlines
Fri 3/296:15 amSAN - STL
3 stops33h 16mSpirit Airlines
Deal found 3/17$738

Cheap St. Louis to San Diego flights in March & April 2024

Find cheap flight options from St. Louis to San Diego specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Prices were last updated on March 19, 2024.
These are some of the most attractive deals on flights from St. Louis to San Diego in 2024. Check back in a little while for more flight options.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Mon 4/229:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$97
Thu 4/1110:56 pmSTL - SAN
1 stop10h 58mFrontier
Sat 4/139:14 pmSAN - STL
1 stop11h 04mFrontier
Deal found 3/17$98
Sun 4/77:37 pmSTL - SAN
1 stop26h 38mFrontier
Wed 4/109:32 pmSAN - STL
1 stop22h 34mFrontier
Deal found 3/18$118
Tue 4/2310:59 pmSTL - SAN
1 stop10h 35mFrontier
Mon 4/299:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$119
Wed 4/107:51 pmSTL - SAN
1 stop14h 03mFrontier
Mon 4/159:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/18$122
Thu 4/2510:59 pmSTL - SAN
1 stop10h 55mFrontier
Sat 5/258:41 pmSAN - STL
1 stop11h 37mFrontier
Deal found 3/18$125
Wed 4/38:45 pmSTL - SAN
1 stop13h 32mFrontier
Tue 4/93:35 pmSAN - STL
1 stop16h 12mFrontier
Deal found 3/18$128
Wed 4/107:51 pmSTL - SAN
1 stop21h 38mFrontier
Sun 4/147:53 amSAN - STL
1 stop24h 25mFrontier
Deal found 3/18$133
Tue 4/1610:59 pmSTL - SAN
1 stop14h 56mMultiple Airlines
Tue 4/236:26 pmSAN - STL
2 stops13h 21mMultiple Airlines
Deal found 3/17$140

St. Louis to San Diego 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and San Diego in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
These are some of the most attractive deals on flights from St. Louis to San Diego in 2024. Check back in a little while for more flight options.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Mon 4/229:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$97
Thu 4/1110:56 pmSTL - SAN
1 stop10h 58mFrontier
Sat 4/139:14 pmSAN - STL
1 stop11h 04mFrontier
Deal found 3/17$98
Sun 4/77:37 pmSTL - SAN
1 stop26h 38mFrontier
Wed 4/109:32 pmSAN - STL
1 stop22h 34mFrontier
Deal found 3/18$118
Tue 4/2310:59 pmSTL - SAN
1 stop10h 35mFrontier
Mon 4/299:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/17$119
Wed 4/107:51 pmSTL - SAN
1 stop14h 03mFrontier
Mon 4/159:32 pmSAN - STL
1 stop10h 46mFrontier
Deal found 3/18$122
Thu 4/2510:59 pmSTL - SAN
1 stop10h 55mFrontier
Sat 5/258:41 pmSAN - STL
1 stop11h 37mFrontier
Deal found 3/18$125
Wed 4/38:45 pmSTL - SAN
1 stop13h 32mFrontier
Tue 4/93:35 pmSAN - STL
1 stop16h 12mFrontier
Deal found 3/18$128
Wed 4/107:51 pmSTL - SAN
1 stop21h 38mFrontier
Sun 4/147:53 amSAN - STL
1 stop24h 25mFrontier
Deal found 3/18$133
Tue 4/1610:59 pmSTL - SAN
1 stop14h 56mMultiple Airlines
Tue 4/236:26 pmSAN - STL
2 stops13h 21mMultiple Airlines
Deal found 3/17$140

St. Louis to San Diego flights leaving soon

Find last-minute flight options from St. Louis to San Diego for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Have a look at some of the last-minute flights available departing from St. Louis to San Diego. To prevent any unwanted surprises, users should verify their flight info before booking.
Tue 3/2610:04 pmSTL - SAN
1 stop11h 43mFrontier
Mon 4/19:15 pmSAN - STL
1 stop11h 08mFrontier
Deal found 3/18$152
Tue 3/2610:04 pmSTL - SAN
1 stop11h 43mFrontier
Tue 4/27:32 pmSAN - STL
2 stops12h 40mFrontier
Deal found 3/18$157
Wed 3/277:37 pmSTL - SAN
1 stop29h 50mMultiple Airlines
Tue 4/210:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$162
Tue 3/267:37 pmSTL - SAN
1 stop18h 24mMultiple Airlines
Tue 4/210:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$166
Mon 3/257:37 pmSTL - SAN
1 stop18h 17mMultiple Airlines
Tue 4/210:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$185
Wed 3/277:37 pmSTL - SAN
1 stop18h 17mMultiple Airlines
Thu 4/411:06 pmSAN - STL
1 stop9h 17mMultiple Airlines
Deal found 3/18$186
Tue 3/267:37 pmSTL - SAN
1 stop18h 24mMultiple Airlines
Wed 4/310:28 pmSAN - STL
1 stop9h 55mMultiple Airlines
Deal found 3/18$189
Mon 3/258:45 pmSTL - SAN
1 stop13h 32mFrontier
Sat 3/302:17 pmSAN - STL
1 stop18h 06mFrontier
Deal found 3/18$204
Wed 3/277:37 pmSTL - SAN
1 stop18h 17mMultiple Airlines
Tue 4/27:32 pmSAN - STL
2 stops12h 40mMultiple Airlines
Deal found 3/18$206

One-way flights to San Diego from St. Louis

Search for one-way flight options from St. Louis to San Diego. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
Users in need of a one-way flight from St. Louis to San Diego can choose from these deals. Users in need of a round-trip flight from St. Louis to San Diego instead should update the search form at the top of page.
Mon 4/158:04 pmSTL - SAN
1 stop12h 56mFrontier
Deal found 3/17$55
Wed 5/811:36 amSTL - SAN
1 stop10h 46mSpirit Airlines
Deal found 3/19$74
Thu 5/910:59 pmSTL - SAN
1 stop10h 55mFrontier
Deal found 3/19$76
Wed 5/111:33 amSTL - SAN
1 stop9h 26mSpirit Airlines
Deal found 3/18$77
Thu 4/47:37 pmSTL - SAN
1 stop13h 39mFrontier
Deal found 3/18$79
Tue 3/267:37 pmSTL - SAN
1 stop18h 24mFrontier
Deal found 3/18$80
Tue 3/267:37 pmSTL - SAN
1 stop23h 16mFrontier
Deal found 3/18$81
Mon 4/155:02 pmSTL - SAN
2 stops19h 40mSpirit Airlines
Deal found 3/17$85
Fri 4/125:35 pmSTL - SAN
1 stop28h 40mFrontier
Deal found 3/18$89

Find flights from St. Louis to San Diego within your budget

Customize your flight search to find flights from St. Louis to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$97 - $236

Route

Depart

Return

Price

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Mon 4/15

1 stop12h 56m

San Diego

Mon 4/22

1 stop10h 46m

$97

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Thu 4/11

1 stop10h 58m

San Diego

Sat 4/13

1 stop11h 04m

$98

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Sun 4/7

1 stop26h 38m

San Diego

Wed 4/10

1 stop22h 34m

$118

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Tue 4/23

1 stop10h 35m

San Diego

Mon 4/29

1 stop10h 46m

$119

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Wed 4/10

1 stop14h 03m

San Diego

Mon 4/15

1 stop10h 46m

$122

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Tue 4/16

1 stop14h 56m

San Diego

Tue 4/23

2 stops13h 21m

$140

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Tue 4/16

2 stops13h 17m

San Diego

Tue 4/23

1 stop8h 22m

$148

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Tue 4/16

3 stops23h 20m

San Diego

Tue 4/23

1 stop12h 43m

$186

Lambert-St LouisSan Diego

STL - SAN

STLSAN

Lambert-St Louis

Sat 5/4

1 stop8h 38m

San Diego

Tue 5/7

1 stop6h 00m

$236

Flights are sorted by cheapest first

Deals found on 3/17

When is the best time to book a flight from St. Louis to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to San Diego. Price data was last updated on January 28, 2024.
To ensure you get the cheapest price possible for a flight from St. Louis to San Diego, you should look to book at least 28 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Search Deals

When is the cheapest time to fly from St. Louis to San Diego?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to San Diego. Price data was last updated on March 17, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to San Diego flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to San Diego by month

Plan your trip from St. Louis to San Diego by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to San Diego is currently $77 while a round-trip flight costs $140. Price data was last updated on March 17, 2024.

Currently, October is the cheapest month in which you can book a flight from St. Louis to San Diego (average of $288). Flying from St. Louis to San Diego in June is currently the most expensive (average of $377). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$292

February

$297

March

$339

April

$327

May

$328

June

$377

July

$368

August

$313

September

$299

October

$288

November

$334

December

$305

Temperature and rainfall in San Diego by month

Plan your trip to San Diego by taking into account the average temperature and rainfall totals by month.

SAN

Temperature

57.2 - 71.6 °F

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated March 19, 2024.
Peruse reviews from past customers who have flown with Frontier, Spirit Airlines and American Airlines from St. Louis to San Diego to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Boarding

8.3

Crew

8.8

Comfort

8.1

Overall

8.2

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Southwest
8.2
Very good
6,382 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Boarding

8.3

Crew

8.8

Comfort

8.1

Overall

8.2

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

8.1
Very good
11,551 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Boarding

8.3

Crew

8.8

Comfort

8.1

Overall

8.2

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.4
Good
11,602 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Boarding

8.3

Crew

8.8

Comfort

8.1

Overall

8.2

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.3
Good
15,312 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Boarding

8.3

Crew

8.8

Comfort

8.1

Overall

8.2

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.3
Good
704 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Boarding

8.3

Crew

8.8

Comfort

8.1

Overall

8.2

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airports do I use to fly from St. Louis to San Diego?

    If you book a flight from St. Louis to San Diego, you will be flying from Lambert-St Louis to San Diego. Flights to San Diego (SAN) from Lambert-St Louis (STL) take 4h 00m for a nonstop flight. There is 1 flight from Lambert-St Louis to San Diego per day from 6 airlines.

  • Can I find flights from St. Louis to San Diego for under $100 on Cheapflights?

    Yes, there are multiple flights from St. Louis to San Diego for under $100. The cheapest flight booked recently is on Frontier for just $97, but on average you can expect to pay $139.

  • Are there last-minute flights available from St. Louis to San Diego for under $200?

    There are currently 20+ open flights from St. Louis to San Diego within the next 7 days for less than $200.

  • What are the cheapest airlines flying from St. Louis to San Diego round-trip?

    Flying on Frontier is currently your cheapest option to San Diego, with prices starting at $97. Another option worth looking into is Spirit Airlines, starting at $186 round trip. You may be able to fly from St. Louis to San Diego for 77% less than the average price by searching for these airlines.

  • What are the most popular airlines that fly from St. Louis to San Diego?

  • What does STL to SAN mean?

    STL and SAN are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. STL to SAN refers to a flight route from Lambert-St Louis Airport to San Diego Airport.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to San Diego
See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from St. Louis to San Diego

Discover the top 6 airlines that operate flights from St. Louis to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$127Average$216FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$138Average$244FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
American AirlinesCheapest$196Average$447FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$295Average$438FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$298Average$451FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapest$617Average$718FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Search flights from St. Louis to San Diego by cabin class

Find flights from St. Louis to San Diego, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from St. Louis to San Diego

Find hourly flight availability from St. Louis to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 19, 2024.
16%of flight departuresEarly morningMidnight to 6 am
38%of flight departuresMorning6 am to noon
23%of flight departuresAfternoonNoon to 6 pm
23%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to San Diego

Explore weekly flight availability from St. Louis to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 19, 2024.
Sunday3daily flights
Monday1daily flight
Tuesday1daily flight
Wednesday1daily flight
Thursday1daily flight
Friday1daily flight
Saturday1daily flight

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to San Diego?

When you search for this flight from St. Louis to San Diego, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to San Diego?

Cheapflights helps you find that perfect flight to San Diego from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from St. Louis to San Diego with no change fees?

Yes! Cheapflights helps users easily find flights from St. Louis to San Diego with no change fees.

Can Cheapflights notify me if prices for flights from St. Louis to San Diego become cheaper?

Not ready to book yet? You can track prices for flights from St. Louis to San Diego on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.