Are there direct flights from San Diego to St. Louis?

Direct flights from San Diego to St. Louis are less common, historically making up about 10% of all flights on this route. For flights that include stopovers, the median number of stopovers across the trailing 90 days was 2. Travelers should anticipate that most journeys will involve at least one connection.

How long does it take to fly from San Diego to St. Louis?

The median flight time for a direct flight from San Diego to St. Louis is typically 9 hours and 23 minutes. For flights with one stop, the median duration is approximately 7 hours and 46 minutes. The distance covered on this route is about 2501 kilometers, with flight times varying based on the number of connections.

Should I set a price alert for San Diego to St. Louis flights?

Yes, setting a price alert for San Diego to St. Louis flights is advisable. Historically, this route has been classified as 'frequent' for price changes. This indicates that deals and price fluctuations occur often, making price alerts a useful tool for travelers looking to secure a better fare.

Flights From San Diego

To St. Louis

Cheap Flights from San Diego to St. Louis

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Deals from

San Diego

RatePunk searches hundreds of travel sites at once for deals on flights to St. Louis

Prices updated 2 days ago

405 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Jul 26, 2026.)

Today’s best flight deals from San Diego to St. Louis

Explore current cheapest deals departing from San Diego to St. Louis

2026-10-24 – 2026-10-28
SAN - St. Louis
85% AI deal score
$361
$178
Round trip
2026-10-13 – 2026-10-28
SAN - St. Louis
82% AI deal score
$308
$178
Round trip
2026-10-20 – 2026-10-28
SAN - St. Louis
84% AI deal score
$338
$178
Round trip
2026-10-10 – 2026-10-28
SAN - St. Louis
82% AI deal score
$304
$178
Round trip
2026-10-14 – 2026-10-28
SAN - St. Louis
82% AI deal score
$313
$179
Round trip
2026-10-21 – 2026-10-28
SAN - St. Louis
84% AI deal score
$350
$179
Round trip
2026-10-03 – 2026-10-28
SAN - St. Louis
82% AI deal score
$302
$179
Round trip
2026-09-05 – 2026-09-08
SAN - St. Louis
85% AI deal score
$277
$185
Round trip
2026-09-02 – 2026-09-07
SAN - St. Louis
85% AI deal score
$273
$185
Round trip
2026-08-26 – 2026-08-27
SAN - St. Louis
90% AI deal score
$358
$186
Round trip

San Diego to St. Louis: Overview

Insights for flights from San Diego to St. Louis

A typical journey from San Diego to St. Louis, including connections, takes about 9h 23m. This reflects the reality that most itineraries on this route involve at least one stopover, with a median of 2 connections for those flights. The overall distance covered on this route is 2501 km, classifying it as a medium-haul flight.

For travelers seeking cheap flights from San Diego to St. Louis, fares typically range from $271–$397, with a median price of $327. Right now, current fares are above the typical level for this route. Approximately 10% of recent fares were classified as a good price, indicating that competitive deals can be found if you monitor prices.

If you are wondering when is the cheapest time to fly from San Diego to St. Louis, the data indicates that April is typically the most affordable month, with a median fare of $160. March also offers competitive pricing, with a median fare of $164. Additionally, December presents another opportunity for lower prices, with a median fare of $197.

Most itineraries for flights from San Diego to St. Louis are not direct. Only about 0.1% of recent fares were for non-stop flights, meaning that most itineraries connect at least once. For those flights that do include connections, the median number of stopovers is 2.

How much is a round trip from San Diego to St. Louis

Regular price: $269 - $400

Prices for flights from San Diego to St. Louis are currently below the regular range.

The regular price range for flights from San Diego to St. Louis is between $269 and $400. The current lowest deal is $180 with Frontier Airlines for travel from Oct 20-Oct 28.

now $180

Low $269

High $400

The cheapest time to fly from San Diego to St. Louis

The cheapest month to fly from San Diego to St. Louis is March, with a median price of $169. The most expensive month is July, with a median price of $473. Generally, prices are lower from January to December.

March

Cheapest

Flights from $169

July

Most Expensive

Flights from $473

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from San Diego to St. Louis

Southwest Airlines

Last-minute flights going from San Diego to St. Louis

Sat, Jul 25

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$479

$360

One-way

Sat, Aug 1

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$533

$288

One-way

Tue, Aug 4

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$428

$253

One-way

Wed, Aug 5

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$372

$239

One-way

Fri, Aug 7

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$408

$240

One-way

Fri, Aug 7

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

$411

$307

One-way

Biggest price drops on these dates for flights from San Diego to St. Louis

4 nights

Aug 1 - Aug 5

$533 → $288

46%

3 nights

Aug 4 - Aug 7

$428 → $253

41%

1 night

Aug 26 - Aug 27

$358 → $186

48%

7 nights

Oct 21 - Oct 28

$349 → $180

48%

Popular Airports to fly from San Diego to St. Louis

San Diego - St. Louis route insights

💸 Price insights

Recent fares are above the typical level

Recent fares from San Diego to St. Louis are above the typical level of $327.

📅 Best time to fly

March is historically the cheapest month to fly

Historically, March is the cheapest month to fly, with a median price of $169.

⏱️ Flight duration

Connecting flights average 7h 46m

Connecting flights from San Diego to St. Louis typically average 7h 46m.

✈️ Airlines & availability

Connecting flights are dominant on this route

Connecting flights make up 90% of available options on this route.

🏆 Airline highlight

Southwest Airlines offers direct flights

Southwest Airlines offers direct flights from San Diego to St. Louis.

🎯 Booking tip

Deals appear frequently

Deals on flights from San Diego to St. Louis appear frequently.

San Diego main airports to depart from

San Diego International (SAN)

Cheapest

San Diego International is a convenient option for flights from San Diego to St. Louis.

📍 ~3 km from San Diego city center (reachable by car or bus)

💸 Flights from ~$184

McClellan–Palomar (CLD)

McClellan–Palomar offers an alternative departure point for your trip to St. Louis.

📍 ~47 km from San Diego city center (reachable by car)

💸 Flights from ~$449

St. Louis main airports to arrive at

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a convenient arrival airport for reaching St. Louis and surrounding areas.

📍 ~20 km from city center (reachable by car, train, and bus)

💸 Flights from ~$184

Airports nearby St. Louis used as alternative

MidAmerica St. Louis (BLV)

MidAmerica St. Louis (BLV) is the closest alternative and a secondary relief airport for the St. Louis metropolitan area.

📍 ~45 km from St. Louis (reachable by car)

💸 Flights from ~$261

Business & First Class Flight Deals to St. Louis

85% AI deal score

$1,869

$1,042

Save $827

Frequently Asked Questions About Flights to St. Louis

Historically, the best prices for flights from San Diego to St. Louis are found when booking 28-59 days in advance. During this period, the average price was $258. Booking within 0-6 days of departure typically saw prices around $292, while booking 60+ days out had an average price of $296. Planning your trip within this optimal window can help secure a more economical fare.

Across the trailing quarter, a good price for a flight from San Diego to St. Louis was considered to be $271 or less. The median price for this route over the same period was $327. Prices can vary, with 75% of fares historically being $397 or less. Aiming for a fare around $271 or below would be considered a good deal.

Historically, April and March have been the cheapest months to fly from San Diego to St. Louis, with median prices of $160 and $164 respectively. December also offered a relatively lower median price of $197. The annual median price for this route is typically around $327, so flying in these months could result in significant savings.

Related routes

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Flights to St. Louis from other cities

Flights from Aberdeen to St. Louis Flights from Atlanta to St. Louis Flights from Austin to St. Louis Flights from Brussels to St. Louis Flights from Dallas to St. Louis Flights from Florence to St. Louis Flights from Las Vegas to St. Louis Flights from Los Angeles to St. Louis Flights from Milwaukee to St. Louis Flights from New York to St. Louis Flights from San Antonio to St. Louis Flights from Singapore to St. Louis

San Diego to St. Louis: Overview

Insights for flights from San Diego to St. Louis

How much is a round trip from San Diego to St. Louis

Regular price: $269 - $400

Prices for flights from San Diego to St. Louis are currently below the regular range.

The regular price range for flights from San Diego to St. Louis is between $269 and $400. The current lowest deal is $180 with Frontier Airlines for travel from Oct 20-Oct 28.

now $180

Low $269

High $400

The cheapest time to fly from San Diego to St. Louis

March

Cheapest

Flights from $169

July

Most Expensive

Flights from $473

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from San Diego to St. Louis

Southwest Airlines

Last-minute flights going from San Diego to St. Louis

Sat, Jul 25

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$479

$360

One-way

Sat, Aug 1

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$533

$288

One-way

Tue, Aug 4

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$428

$253

One-way

Wed, Aug 5

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$372

$239

One-way

Fri, Aug 7

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

Frontier Airlines

$408

$240

One-way

Fri, Aug 7

⌛ Last-Minute

SAN - St. Louis

San Diego (SAN) - St. Louis (STL)

$411

$307

One-way

Biggest price drops on these dates for flights from San Diego to St. Louis

4 nights

Aug 1 - Aug 5

$533 → $288

46%

3 nights

Aug 4 - Aug 7

$428 → $253

41%

1 night

Aug 26 - Aug 27

$358 → $186

48%

7 nights

Oct 21 - Oct 28

$349 → $180

48%

Popular Airports to fly from San Diego to St. Louis