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St. Louis

$115+ Cheap flights from San Diego to St. Louis (SAN - STL)

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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — STL
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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1. Tell us where you want to go
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Cheapflights Tip: The best prices from San Diego to Lambert-St Louis are usually found in August or February, booked 66 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from San Diego to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to St. Louis (STL). 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 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(United Airlines)

One-way from

$115
(Alaska Airlines)

Popular in

December

Cheapest in

August

Average price

$392

Good round-trip deal

$435 or less

Good one-way deal

$218 or less
Provider with most accurate pricing for San Diego-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for San Diego-Lambert-St Louis flights.
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From San Diego to Lambert-St Louis
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One-way flight from San Diego to Lambert-St Louis
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Highest demand for flights based on searches. 11% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from San Diego to Lambert-St Louis.
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Price to beat on a one-way flight from San Diego to Lambert-St Louis.
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Find flight deals from San Diego to St. Louis

Cheapest flights from San Diego to St. Louis
Explore the most affordable flight options available from San Diego to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/106:20 amSAN - STL
1 stop8h 50mDelta
Sun 5/116:00 amSTL - SAN
1 stop8h 56mDelta
Deal found 3/23$277
This United Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2210:16 amSAN - STL
2 stops9h 34mUnited Airlines
Fri 4/258:40 amSTL - SAN
1 stop7h 10mUnited Airlines
Deal found 3/24$297
This Frontier deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/58:37 pmSAN - STL
1 stop10h 35mFrontier
Fri 6/62:27 pmSTL - SAN
1 stop5h 49mFrontier
Deal found 3/24$298
This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/138:45 amSAN - STL
2 stops6h 30mSouthwest
Fri 5/166:10 pmSTL - SAN
1 stop6h 10mSouthwest
Deal found 3/24$312
This Mytrip deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/138:48 pmSAN - STL
2 stops34h 27mMultiple Airlines
Fri 5/1612:15 pmSTL - SAN
3 stops31h 45mMultiple Airlines
Deal found 3/24$321
This American Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/166:29 amSAN - STL
1 stop5h 13mAmerican Airlines
Wed 4/166:00 pmSTL - SAN
1 stop7h 28mAmerican Airlines
Deal found 3/23$335
This Alaska Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/158:15 amSAN - STL
2 stops13h 44mAlaska Airlines
Sat 4/193:11 pmSTL - SAN
1 stop8h 38mAlaska Airlines
Deal found 3/24$344
This Hawaiian Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2411:35 amSAN - STL
1 stop10h 24mHawaiian Airlines
Fri 3/283:11 pmSTL - SAN
1 stop8h 38mHawaiian Airlines
Deal found 3/24$852

Cheapflights Fare Finder

Customize your flight search to find flights from San Diego to St. Louis 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 2,558,603 searches. Data last updated March 25, 2025.
Use the filters below to find and compare flights from San Diego to St. Louis that are best for you.

Fly from

San Diego

Fly to

St. Louis

Route

Depart

Return

Price

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Sat 5/10

6:20 am-5:10 pm

1 stop8h 50m

Lambert-St Louis

Sun 5/11

6:00 am-12:56 pm

1 stop8h 56m

$277

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 4/22

10:16 am-9:50 pm

2 stops9h 34m

Lambert-St Louis

Fri 4/25

8:40 am-1:50 pm

1 stop7h 10m

$297

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Thu 6/5

8:37 pm-9:12 am

1 stop10h 35m

Lambert-St Louis

Fri 6/6

2:27 pm-6:16 pm

1 stop5h 49m

$298

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 5/13

8:45 am-5:15 pm

2 stops6h 30m

Lambert-St Louis

Fri 5/16

6:10 pm-10:20 pm

1 stop6h 10m

$312

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 5/13

8:48 pm-9:15 am

2 stops34h 27m

Lambert-St Louis

Fri 5/16

12:15 pm-6:00 pm

3 stops31h 45m

$321

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Wed 4/16

6:29 am-1:42 pm

1 stop5h 13m

Lambert-St Louis

Wed 4/16

6:00 pm-11:28 pm

1 stop7h 28m

$335

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 4/15

8:15 am-11:59 pm

2 stops13h 44m

Lambert-St Louis

Sat 4/19

3:11 pm-9:49 pm

1 stop8h 38m

$344

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 5/27

1:39 pm-12:04 am

1 stop8h 25m

$115

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 4/22

10:33 pm-9:37 am

1 stop9h 04m

$116

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 5/6

9:08 pm-9:15 am

2 stops34h 07m

$122

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 16 results
1
2

Compare providers for flights from San Diego to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to St. Louis in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Diego-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Diego-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Diego-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from San Diego to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from San Diego with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Diego to St. Louis

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

Use this chart to determine the optimal time to book a round-trip flight from San Diego to St. Louis. Price data was last updated on March 21, 2025.

The best time to book flights from San Diego to St. Louis is 66 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Diego to St. Louis?

Currently, August is the cheapest month in which you can book a flight from San Diego to St. Louis (average of $311). Flying from San Diego to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from SAN to STL?

Find hourly flight availability from San Diego to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

A simple way to save on the total cost of your ticket is to fly from San Diego to St. Louis in the evening. If you’re flexible enough to do this you can expect to save up to 60% on your trip compared to booking a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from San Diego to St. Louis. Price data was last updated on March 23, 2025.

Travelers seeking maximum savings on their San Diego to St. Louis flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated March 25, 2025.
To help decide which airline to fly from San Diego to St. Louis, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,785 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Overall

8.0

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from San Diego to St. Louis. 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 San Diego to St. Louis?

    To fly from San Diego to St. Louis, you need to book a flight from San Diego (SAN) to Lambert-St Louis (STL). Nonstop flights to Lambert-St Louis from San Diego take 3h 30m on average. When it comes time to book airfare, you have a few options: there is 1 outbound flight from San Diego to Lambert-St Louis offered by 5 different airlines.

  • How popular is this San Diego to St. Louis flight route?

    Flights from San Diego to Lambert-St Louis have been viewed 8 times in the past calendar month.

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

    Cheapflights users have booked flights from San Diego to St. Louis round-trip from $277. Other airlines that can offer you cheap pricing are Frontier, from $298, and Southwest, from $312. United Airlines is priced at 21% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from San Diego to St. Louis one-way?

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as $115. Users have also found prices from $116 and $122 on American Airlines and Spirit Airlines, respectively.

  • What are the cheapest flights from San Diego to St. Louis?

    Looking for the cheapest flight from San Diego to St. Louis? While on average our users pay $383, our data indicates the cheapest price to be $184. The most popular route (San Diego - Lambert-St Louis), is priced around $241.

  • Where are the most common layover locations when flying from San Diego to St. Louis?

    Of the flights from San Diego to St. Louis that have layovers, most of them stop in Phoenix.

  • What are some popular things to do or see while on a layover in Phoenix?

    Chase Field, Desert Ridge Marketplace, and Phoenix Symphony Hall are currently the most popular points of interest in Phoenix at the moment. Those on a layover in Phoenix interested in visiting Chase Field, Desert Ridge Marketplace, or Phoenix Symphony Hall can do so by traveling 4.0 mi, 16.7 mi, and 4.3 mi, respectively from Phoenix Sky Harbor Intl. Travelers can book a car rental at Phoenix Sky Harbor Intl for about $68 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for San Diego to St. Louis flights?

    San Diego to St. Louis flights have a layover in Denver the least frequently.

  • Can I find deals for flights from San Diego to St. Louis that include hotel bookings?

    Yes. In addition to deals on San Diego to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Diego to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Diego to St. Louis.

  • Can I find deals for business class flights from San Diego to St. Louis?

    Yes. Cheapflights offers flight deals from San Diego to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, August is the cheapest month in which you can book a flight from San Diego to St. Louis (average of $311). Flying from San Diego to St. Louis in March is currently the most expensive (average of $356). 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.

See more FAQs

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
Chesterfield

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Alternative routes for San Diego to St. Louis

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Top 5 airlines flying from San Diego to St. Louis

Discover the top 5 airlines that operate flights from San Diego to St. Louis. 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 2,558,603 searches. Data last updated March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$236FlexibilityNo cancel feeOn-time62%
DeltaCheapest$184Average$278FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$236Average$358FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$256Average$347FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$343Average$493FlexibilityNo cancel feeOn-time63%
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