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$147+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SFO
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to San Francisco are usually found in February or January, booked 23 days in advance, depart on a Thursday or Saturday and return on a Tuesday

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 July 28, 2025.

Round-trip from

$251
(FlightHub)

One-way from

$147
(Southwest)

Popular in

June

Cheapest in

February

Average price

$422

Good round-trip deal

$470 or less

Good one-way deal

$249 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 ($6 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 28, 2025.

This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/125:40 pmSTL - SFO
1 stop18h 45mFrontier
Thu 8/215:45 amSFO - STL
1 stop6h 01mFrontier
Deal found 7/28$251
This American Airlines deal was found by Cheapflights users on 7/27. 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 9/172:01 pmSTL - SFO
1 stop11h 08mAmerican Airlines
Tue 9/2312:47 amSFO - STL
1 stop10h 44mAmerican Airlines
Deal found 7/27$277
This Southwest deal was found by Cheapflights users on 7/28. 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 9/99:10 amSTL - SFO
Nonstop4h 10mSouthwest
Tue 9/91:45 pmSFO - STL
Nonstop3h 50mSouthwest
Deal found 7/28$293
This Delta deal was found by Cheapflights users on 7/27. 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.
Tue 10/73:26 pmSTL - SFO
2 stops10h 07mDelta
Wed 10/810:30 amSFO - STL
2 stops10h 32mDelta
Deal found 7/27$294
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 10/16:00 amSTL - SFO
1 stop9h 44mAlaska Airlines
Tue 10/142:40 pmSFO - STL
1 stop7h 23mAlaska Airlines
Deal found 7/27$312

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 July 28, 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

Tue 8/12

5:40 pm-10:25 am

1 stop18h 45m

San Francisco

Thu 8/21

5:45 am-1:46 pm

1 stop6h 01m

$251

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 9/17

2:01 pm-11:09 pm

1 stop11h 08m

San Francisco

Tue 9/23

12:47 am-1:31 pm

1 stop10h 44m

$277

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 9/9

9:10 am-11:20 am

Nonstop4h 10m

San Francisco

Tue 9/9

1:45 pm-7:35 pm

Nonstop3h 50m

$293

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Tue 10/7

3:26 pm-11:33 pm

2 stops10h 07m

San Francisco

Wed 10/8

10:30 am-11:02 pm

2 stops10h 32m

$294

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 10/1

6:00 am-1:44 pm

1 stop9h 44m

San Francisco

Tue 10/14

2:40 pm-12:03 am

1 stop7h 23m

$312

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 8/27

2:25 pm-11:33 pm

2 stops11h 08m

$147

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Mon 9/1

2:01 pm-9:03 pm

1 stop9h 02m

$152

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Wed 9/24

3:35 pm-9:20 pm

1 stop7h 45m

$156

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Sat 10/11

4:40 pm-6:55 pm

Nonstop4h 15m

$157

St. LouisSan Francisco

STL - SFO

STLSFO

Lambert-St Louis

Fri 8/29

2:30 pm-10:51 pm

2 stops10h 21m

$166

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 11 results
1
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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 July 25, 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 $358). 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 July 28, 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 July 27, 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 July 28, 2025.

The most flights from STL to SFO are scheduled on a Monday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

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 July 28, 2025.
Read through reviews of airlines operating flights from St. Louis to San Francisco, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

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

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

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
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

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
7,975 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

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
8,892 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

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

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Boarding

8.1

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 15 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 ($251), American Airlines ($277), and Southwest ($293) offers the cheapest pricing from St. Louis to San Francisco. Frontier is currently priced 33% 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 Southwest, with whom users have recently found tickets for as low as $147. However, be on the lookout for offers from Frontier and Alaska Airlines, 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 (72%), United Airlines (63%) and Air New Zealand (61%).

  • 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 $1,176, our data indicates the cheapest price to be $205. The most popular route (Lambert-St Louis - San Francisco), is priced around $264.

  • 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 $358). 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 Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Mountain View
Santa Cruz
South San Francisco
Livermore
Turlock
Manteca
Antioch
Hollister
Watsonville
Newark
Milpitas
Sunnyvale
Campbell
Lathrop
Foster City
Capitola
Santa Clara
San Leandro
Burlingame

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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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$204FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$226Average$352FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$242Average$414FlexibilityNo cancel feeOn-time69%
DeltaCheapest$256Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$308Average$432FlexibilityNo cancel feeOn-time63%

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