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

Direct flights from San Diego to St. Louis are available, though they represent a smaller portion of the overall flight options. Historically, approximately 10% of flights on this route have been direct. For flights that include stopovers, travelers typically experience 2 stopovers on average.

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

The typical direct flight from San Diego to St. Louis covers a distance of 2501 kilometers and has a median duration of 9 hours and 23 minutes. Flights with one stopover are generally shorter in the air, with a median duration of 7 hours and 46 minutes. This difference in total travel time can vary based on the specific routing and layover durations.

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

Historically, deals for flights from San Diego to St. Louis have been frequent. This suggests that setting a price alert could be beneficial for travelers looking to secure a favorable fare. Given the consistent availability of deals, an alert can help you track price fluctuations and identify optimal booking times.

Flights From San Diego

To St. Louis

Cheap Flights from San Diego to St. Louis

Browse current best options from San Diego. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

San Diego

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

Prices updated 1 day ago

462 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Sep 15, 2026.)

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

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

2026-10-23 – 2026-10-30
SAN - St. Louis
80% AI deal score
$339
$215
Round trip
2026-10-06 – 2026-10-21
SAN - St. Louis
75% AI deal score
$297
$235
Round trip
2026-10-06 – 2026-10-28
SAN - St. Louis
75% AI deal score
$290
$235
Round trip
2026-10-06 – 2026-10-20
SAN - St. Louis
76% AI deal score
$303
$235
Round trip
2027-02-17 – 2027-02-23
SAN - St. Louis
80% AI deal score
$291
$236
Round trip
2027-02-17 – 2027-03-02
SAN - St. Louis
74% AI deal score
$274
$236
Round trip
2026-10-07 – 2026-10-21
SAN - St. Louis
76% AI deal score
$303
$236
Round trip
2026-10-07 – 2026-10-20
SAN - St. Louis
76% AI deal score
$303
$236
Round trip
2026-10-27 – 2026-10-28
SAN - St. Louis
83% AI deal score
$355
$236
Round trip
2026-10-06 – 2026-10-13
SAN - St. Louis
82% AI deal score
$341
$236
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 takes about 9h 23m, including connections. Given that most itineraries connect at least once, this duration accounts for layovers. The median connecting flight time is 7h 46m, while a non-stop flight would also take 9h 23m.

For travelers seeking cheap flights from San Diego to St. Louis, fares typically range from $271–$397, with a median of $327. Right now, current fares are above the typical level. Approximately 10% of recent fares were classified as a good price, and new deals appear almost daily, suggesting frequent opportunities to find better prices.

If you are looking for the cheapest time to fly from San Diego to St. Louis, April stands out with a median fare of $160. March also offers competitive prices, with a median of $164. Additionally, December presents another opportunity for lower fares, with a median of $197.

The route between San Diego and St. Louis is primarily served by connecting flights, with only 0.1% of recent fares being non-stop. This means most itineraries connect at least once, and for those connecting flights, the typical number of stopovers is 2.

The distance between San Diego and St. Louis is 2501 kilometers, classifying this as a medium-haul route. This distance generally means you can expect a flight experience that balances comfort with efficiency, often involving a single stop for connecting itineraries.

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

Regular price: $270 - $416

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 $270 and $416. The current lowest deal is $216 with Frontier Airlines for travel from Oct 23-Oct 30.

now $216

Low $270

High $416

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

Frontier Airlines

Deutsche Luft Hansa

Alaska Airlines, Inc.

United Airlines

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

Tue, Sep 15

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$492

$403

One-way

Thu, Sep 17

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$422

$388

One-way

Fri, Sep 18

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$476

$358

One-way

Wed, Sep 23

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$334

$318

One-way

Thu, Sep 24

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$331

$312

One-way

Fri, Sep 25

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$329

$247

One-way

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

2 nights

Sep 18 - Sep 20

$476 → $358

25%

2 nights

Sep 15 - Sep 17

$492 → $403

18%

3 nights

Sep 25 - Sep 28

$329 → $247

25%

4 nights

Sep 25 - Sep 29

$327 → $254

22%

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 for this route.

📅 Best time to fly

Fly in April for the best prices

Historically, April offers the lowest median price at $160, followed by March at $164.

⏱️ Flight duration

Connecting flights are faster

Connecting flights typically take 7h 46m, while nonstop flights average 9h 23m.

✈️ Airlines & availability

Connecting flights are dominant

Only 10% of recent flights from San Diego to St. Louis are direct, with 2 stopovers typical.

🏆 Airline highlight

Frontier Airlines offers the most direct deals

Frontier Airlines has 90 direct deals, followed by Deutsche Luft Hansa with 3 direct deals.

🎯 Booking tip

Deals are frequent on this route

Deals for flights from San Diego to St. Louis are frequent, appearing often in a 30-day window.

San Diego main airports to depart from

San Diego International (SAN)

Cheapest

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

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

💸 Flights from ~$159

St. Louis main airports to arrive at

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is ideal for direct access to St. Louis and surrounding areas.

📍 ~20 km from St. Louis (reachable by car, bus, metro).

💸 Flights from ~$158

Airports nearby St. Louis used as alternative

MidAmerica St. Louis (BLV)

MidAmerica St. Louis (BLV) is a useful alternative, especially for travelers on the Illinois side of the metro area.

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

💸 Flights from ~$376

Business & First Class Flight Deals to St. Louis

43% AI deal score

$2,377

From SAN

Elite

Sep 14

St. Louis, United States

43% AI deal score

$2,565

From SAN

Elite

Nov 10

St. Louis, United States

42% AI deal score

$1,679

From SAN

Elite

Dec 17

St. Louis, United States

42% AI deal score

$2,339

From SAN

Elite

Sep 16

St. Louis, United States

42% AI deal score

$2,578

From SAN

Elite

Nov 19

St. Louis, United States

41% AI deal score

$2,463

Frequently Asked Questions About Flights to St. Louis

Historically, the sweet spot for booking flights from San Diego to St. Louis to secure the lowest prices has been between 28 and 59 days prior to departure. During this period, the average price was $258. Booking within 6 days of departure typically saw prices rise to an average of $292. Even booking more than 60 days out generally resulted in higher average fares, around $296.

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. Fares around $397 or higher were typically among the more expensive options available.

Historically, April has been one of the cheapest months to fly from San Diego to St. Louis, with a median price of $160. March also offered competitive fares, with a median price of $164. The annual median price for this route was $327, indicating significant savings are possible during these months.

Related routes

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Flights to St. Louis from other cities

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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: $270 - $416

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 $270 and $416. The current lowest deal is $216 with Frontier Airlines for travel from Oct 23-Oct 30.

now $216

Low $270

High $416

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

Frontier Airlines

Deutsche Luft Hansa

Alaska Airlines, Inc.

United Airlines

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

Tue, Sep 15

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$492

$403

One-way

Thu, Sep 17

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$422

$388

One-way

Fri, Sep 18

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$476

$358

One-way

Wed, Sep 23

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$334

$318

One-way

Thu, Sep 24

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$331

$312

One-way

Fri, Sep 25

⌛ Last-Minute

SAN - St. Louis

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

Frontier Airlines

$329

$247

One-way

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

2 nights

Sep 18 - Sep 20

$476 → $358

25%

2 nights

Sep 15 - Sep 17

$492 → $403

18%

3 nights

Sep 25 - Sep 28

$329 → $247

25%

4 nights

Sep 25 - Sep 29

$327 → $254

22%

Popular Airports to fly from San Diego to St. Louis