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$138+ Cheap flights from St. Louis to San Francisco (STL - SFO)

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SFO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to San Francisco are usually found in August or February, booked 23 days in advance, depart on a Thursday or Saturday and return on a Saturday

Cheap flight deals from St. Louis to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to San Francisco (SFO). 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 June 12, 2025.

Round-trip from

$265
(FlightHub)

One-way from

$138
(American Airlines)

Popular in

June

Cheapest in

August

Average price

$427

Good round-trip deal

$545 or less

Good one-way deal

$238 or less
From Lambert-St Louis to San Francisco
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One-way flight from Lambert-St Louis to San Francisco
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Highest demand for flights based on searches. 8% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Lambert-St Louis to San Francisco.
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Price to beat on a one-way flight from Lambert-St Louis to San Francisco.
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Find flight deals from St. Louis to San Francisco

Cheapest flights from St. Louis to San Francisco
Explore the most affordable flight options available from St. Louis to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Frontier deal was found by Cheapflights users on 6/11. 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 9/117:52 pmSTL - SFO
1 stop6h 22mFrontier
Mon 9/158:04 pmSFO - STL
1 stop11h 03mFrontier
Deal found 6/11$261
This United Airlines deal was found by Cheapflights users on 6/10. 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 10/75:47 pmSTL - SFO
Nonstop4h 21mUnited Airlines
Tue 10/2110:45 amSFO - STL
Nonstop4h 00mUnited Airlines
Deal found 6/10$277
This American Airlines deal was found by Cheapflights users on 6/11. 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 10/89:42 amSTL - SFO
1 stop8h 42mAmerican Airlines
Wed 10/298:00 amSFO - STL
1 stop10h 23mAmerican Airlines
Deal found 6/11$281
This Sun Country Air deal was found by Cheapflights users on 6/10. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/296:12 amSTL - SFO
1 stop27h 56mSun Country Air
Sat 7/126:14 pmSFO - STL
1 stop23h 17mSun Country Air
Deal found 6/10$285
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 10/73:57 pmSTL - SFO
1 stop8h 32mAlaska Airlines
Wed 10/222:44 pmSFO - STL
1 stop7h 15mAlaska Airlines
Deal found 6/10$296
This Delta deal was found by Cheapflights users on 6/11. 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.
Thu 8/147:11 pmSTL - SFO
1 stop6h 37mDelta
Tue 8/1911:59 pmSFO - STL
1 stop7h 58mDelta
Deal found 6/11$297
This Southwest deal was found by Cheapflights users on 6/11. 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.
Wed 10/84:25 pmSTL - SFO
1 stop6h 45mSouthwest
Wed 10/292:05 pmSFO - STL
2 stops8h 25mSouthwest
Deal found 6/11$302

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to San Francisco 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 June 12, 2025.
Use the filters below to find and compare flights from St. Louis to San Francisco that are best for you.

Fly from

St. Louis

Fly to

San Francisco

Route

Depart

Return

Price

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 8/28

7:54 pm-12:19 am

1 stop6h 25m

San Francisco

Tue 9/2

6:50 am-9:11 am

1 stop24h 21m

$265

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sun 6/29

6:12 am-8:08 am

1 stop27h 56m

San Francisco

Sat 7/12

6:14 pm-7:31 pm

1 stop23h 17m

$285

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 8/28

5:49 pm-8:10 pm

Nonstop4h 21m

San Francisco

Tue 9/2

6:30 am-4:33 pm

1 stop8h 03m

$287

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 7/30

6:14 am-10:56 am

1 stop6h 42m

San Francisco

Wed 8/6

6:10 am-6:23 pm

1 stop10h 13m

$292

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Thu 8/14

7:11 pm-11:48 pm

1 stop6h 37m

San Francisco

Tue 8/19

11:59 pm-9:57 am

1 stop7h 58m

$297

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 8/4

7:15 pm-12:15 am

1 stop7h 00m

San Francisco

Wed 8/13

1:45 pm-7:35 pm

Nonstop3h 50m

$327

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sun 8/10

7:32 pm-9:16 am

1 stop15h 44m

San Francisco

Thu 8/21

7:00 am-5:34 pm

1 stop8h 34m

$375

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 9/10

2:01 pm-11:09 pm

1 stop11h 08m

$138

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 8/25

5:49 pm-8:10 pm

Nonstop4h 21m

$139

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sun 8/24

5:10 pm-10:51 pm

1 stop7h 41m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 15 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to San Francisco from St. Louis 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 St. Louis to San Francisco

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to San Francisco. Price data was last updated on June 9, 2025.

The best time to book flights from St. Louis to San Francisco is 23 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 St. Louis to San Francisco?

Currently, January is the cheapest month in which you can book a flight from St. Louis to San Francisco (average of $276). Flying from St. Louis to San Francisco in June is currently the most expensive (average of $364). 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 STL to SFO?

Find hourly flight availability from St. Louis to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

It’s typically best to fly out from St. Louis to San Francisco at noon. Doing so could potentially save you 62% on the flight price compared to flying in the evening, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from St. Louis to San Francisco. Price data was last updated on June 8, 2025.

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

Weekly flight availability from St. Louis to San Francisco

Explore weekly flight availability from St. Louis to San Francisco. 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 June 12, 2025.

The most flights from STL to SFO are scheduled on a Wednesday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 Francisco. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from St. Louis to San Francisco. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

    If you wish to fly to San Francisco from St. Louis, then you need to book flights from Lambert-St Louis to San Francisco. There are 4 flights from Lambert-St Louis (STL) to San Francisco (SFO) per day to choose from. Flights to San Francisco from Lambert-St Louis are available from 5 different airlines, which means you should have some options if you want to compare airfare deals. 4h 10m is how long a nonstop flight from St. Louis to San Francisco typically takes.

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

    This flight path from Lambert-St Louis to San Francisco was viewed by 14 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    According to our current data, Frontier ($265), American Airlines ($281), and Sun Country Air ($285) offers the cheapest pricing from St. Louis to San Francisco. Frontier is currently priced 28% below the average price you’ll pay for this route.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $138. However, be on the lookout for offers from United Airlines and Sun Country Air, as they are both options that can get you from St. Louis to San Francisco for a low price.

  • What are the most reliable airlines from St. Louis to San Francisco?

    The top 3 most reliable airlines when flying from St. Louis to San Francisco are Southwest (89%), United Airlines (82%) and Air New Zealand (82%).

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

    Looking for the cheapest flight from St. Louis to San Francisco? While on average our users pay $2,074, our data indicates the cheapest price to be $178. The most popular route (Lambert-St Louis - San Francisco), is priced around $265.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to San Francisco 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 St. Louis to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to San Francisco (average of $276). Flying from St. Louis to San Francisco in June is currently the most expensive (average of $364). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Roseville
Mountain View
South San Francisco
Livermore
Turlock
Santa Cruz
Manteca
Fairfield
Watsonville
Antioch
Hollister
Milpitas
Newark
Hayward
Alameda
Sunnyvale
Daly City
Union City
Campbell
Capitola

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Alternative routes for St. Louis to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from St. Louis to San Francisco

Discover the top 5 airlines that operate flights from St. Louis to San Francisco. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$117Average$181FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$236Average$352FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$239Average$403FlexibilityNo cancel feeOn-time69%
DeltaCheapest$239Average$351FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$308Average$435FlexibilityNo cancel feeOn-time63%

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