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STL - SFO

Find cheap flights from St. Louis to San Francisco from $55

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to San Francisco departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Fri 5/24
Fri 5/31

Search hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Francisco.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Francisco.
In the last 7 days travelers have searched 45,119,101 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to San Francisco (STL-SFO)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
10:59 pm - 9:44 amSTL-SFO
12h 45m1 stop
12:58 am - 3:50 pmSFO-STL
12h 52m1 stop
$113Frontier
Find Deal
Thu, May 9 - Mon, May 13
7:23 pm - 10:07 pmSTL-SFO
28h 44m1 stop
12:07 pm - 10:13 amSFO-STL
20h 06m1 stop
$122Frontier
Find Deal
Thu, May 16 - Sat, May 18
4:20 pm - 10:56 pmSTL-SFO
8h 36m1 stop
7:30 am - 3:40 pmSFO-STL
6h 10m1 stop
$198American Airlines
Find Deal
Tue, Aug 27 - Tue, Sep 3
11:51 am - 6:44 pmSTL-SFO
8h 53m1 stop
10:50 am - 9:31 pmSFO-STL
8h 41m1 stop
$247Delta
Find Deal
Wed, Oct 9 - Thu, Oct 10
6:13 am - 12:57 pmSTL-SFO
8h 44m1 stop
12:40 am - 11:10 amSFO-STL
8h 30m1 stop
$258Delta
Find Deal
Sat, May 4 - Mon, May 6
7:56 pm - 12:04 amSTL-SFO
6h 08m1 stop
12:54 am - 9:00 amSFO-STL
6h 06m1 stop
$285American Airlines
Find Deal
Thu, Sep 5 - Sat, Sep 7
7:00 am - 1:44 pmSTL-SFO
8h 44m1 stop
4:55 pm - 1:36 pmSFO-STL
18h 41m2 stops
$406Alaska Airlines
Find Deal
Tue, May 21 - Tue, May 28
5:25 pm - 1:59 pmSTL-SFO
22h 34m2 stops
11:59 pm - 9:53 amSFO-STL
7h 54m1 stop
$416United Airlines
Find Deal
Tue, May 21 - Tue, May 28
6:05 pm - 8:30 pmSTL-SFO
4h 25mnonstop
11:35 pm - 10:07 amSFO-STL
8h 32m1 stop
$434United Airlines
Find Deal
Thu, Sep 26 - Sun, Sep 29
7:00 am - 1:44 pmSTL-SFO
8h 44m1 stop
7:55 pm - 6:41 pmSFO-STL
20h 46m2 stops
$436Alaska Airlines
Find Deal
Tue, May 21 - Tue, May 21

Flights from St. Louis to San Francisco - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to San Francisco to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to San Francisco?

The average price of all flights from St. Louis to San Francisco clicked on KAYAK for each day over the last 12 months.
When flying from St. Louis to San Francisco, you should consider leaving on a Tuesday and avoid Mondays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Tuesdays and the most expensive ones on Thursdays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to San Francisco is October, where tickets cost $360 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $502 and $477 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to San Francisco, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 13 days before departure.

Which airlines provide the cheapest flights from St. Louis to San Francisco?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from St. Louis to San Francisco found on KAYAK was with Frontier for $55. Frontier proposed a round-trip connection from $113 and American Airlines from $198.

How many flights are there between St. Louis and San Francisco per day?

There is a maximum of 1 nonstop flight a day that takes off from St. Louis and lands in San Francisco, with an average flight time of 4h 15m. The most common departure time is 12:00 pm and most flights take off in the morning. Each week, there are 7 flights.

How long does a flight from St. Louis to San Francisco take?

Direct flights cover the 1,730 miles separating St. Louis to San Francisco in about 4h 25m.

What’s the earliest departure time from St. Louis to San Francisco?

Early birds can take the earliest flight from St. Louis at 12:35 pm and will be landing in San Francisco at 2:50 pm.

What’s the latest departure time from St. Louis to San Francisco?

If you prefer to fly at night, the latest flight from St. Louis to San Francisco jets off at 6:35 pm and lands at 8:50 pm.

Good to know

Low season

January

High season

December

Cheapest flight

$55
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from St. Louis to San Francisco

When to book flights from St. Louis to San Francisco

Are your dates flexible? Find out the best times to travel from St. Louis to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to San Francisco

  • Where can I sleep at San Francisco International Airport (SFO)?

    FreshenUp in the International Terminal provides three nap rooms that passengers can rent by the hour. FreshenUp is landside on level G, next to the airport travel agency. The nap rooms have a bed, desk, mirror, and free Wi-Fi. Showers are also provided but at an additional cost. Grand Hyatt at SFO is a hotel within SFO grounds that offers days rooms and overnight stays. It is connected to the airport via the AirTrain.

  • Does San Francisco International Airport offer family services?

    Nursing rooms have been provided for those traveling with infants at SFO. Nursing rooms are private and lockable and have comfortable seating and power outlets. You’ll find nursing rooms airside in Terminals 1, 2, and 3, with only Terminal 2 providing a landside option. Cloud of Good at SFO is an establishment that offers car seats and strollers for rent. They have three locations at SFO, one in each terminal. SFO has children play areas with interactive exploration areas for the older kids. You’ll find the play area around Gates 22, 54A, 58B, 87A, and 62.

  • Does San Francisco International Airport offer accessible services?

    Yes, SFO is a fully accessible airport. PRM will quickly get through the terminals, with ramps and elevators providing barrier-free access. PRM will also get accessible restrooms, reserved parking spots, dedicated seating, fast track services, and wheelchair assistance from their airlines. Low vision passengers coming through SFO have tactile guide paths, braille-coded elevator buttons, and Aira services to guide them through the airport. SFO has also provided TDD telephones and visual paging for hard-of-hearing passengers.

  • What are the transport options from San Francisco International Airport?

    Trains are the quickest means of getting downtown, and SFO is served by the San Francisco BART, which you can take from the SFO station at the Departures level of the International Terminal. You can also take the BART and connect to CalTrain commuter train services that serve the larger San Francisco area and San Jose. SamTrans provides bus services between SFO and downtown San Francisco. They have three bus routes serving SFO, and you can board these buses from the baggage claim level of Terminals 2 and 3 and level 1 of Courtyard A in the International Terminal.

  • What is the cheapest flight from St. Louis to San Francisco?

    In the last 3 days, the lowest price for a flight from St. Louis to San Francisco was $55 for a one-way ticket and $113 for a round-trip.

  • Do I need a passport to fly between St. Louis and San Francisco?

    No

  • Which aircraft models fly most regularly from St. Louis to San Francisco?

    We unfortunately don’t have that data for this specific route.

  • On which days can I fly direct from St. Louis to San Francisco?

    There are nonstop flights from St. Louis to San Francisco on a daily basis.

  • Which is the best airline for flights from St. Louis to San Francisco, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to San Francisco are Alaska Airlines and Delta. With an average price for the route of $552 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $436 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from St. Louis to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SFO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from STL to San Francisco

  • St. Louis Lambert International Airport (STL) has two terminals and five concourses. The airport has provided a free shuttle for inter-terminal transportation that runs every 8-12min.
  • STL welcomes cats, dogs, and all pets. The airport has provided six pet relief areas, including indoors and outdoors. The indoor locations are after security, while the outdoor locations are outside Terminal 2 and the upper west side of Terminal 1.
  • American Airlines is the only airline with a lounge at STL. You must pay at the door and show your flight ticket to access this lounge. The AA lounge is airside between Concourses B and C.
  • US Bank has a full-service branch at STL. The bank offers banking and currency exchange services, and the bank is on the lower level of Terminal 1.
  • Around 920 kg of carbon is emitted on flights from St. Louis to San Francisco. You can fly more sustainably with Frontier Airlines, which offers flights that emit 45% less carbon per passenger.
See more tips

Prefer to fly non-stop from St. Louis to San Francisco?

Find which airlines fly direct from Lambert-St Louis to San Francisco, which days they fly and book direct flights.

Nonstop departures

Lambert-St Louis to San Francisco

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Nonstop returns

San Francisco to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 4 airlines serving from St. Louis to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 11004 reviews
8.2boarding
8.0entertainment
7.5food
8.6crew
7.9comfort
Airline reviews

There was a loud squeaky sound the whole time we were flying.

6.0 GoodEliza, Apr 2024SAN - LAX
Read more about Delta reviews

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

Really impressive staff at airport and on plane, especially given how busy it was

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

United airline kept delaying our flight back to Phoenix for 8 hours before they cancelled it! If they know that we are not flying out for whatever the reason is, why did they keep lying to us for hours. We could find another flight earlier or even find a hotel with a shuttle. But cancellation at about midnight was not fun. We stayed in the airport all night till the following morning when we bought an Alaska tickets to go back to Phoenix. Total of 14 hours in the airport.

Poor seating comfort, seat cushion too thin, very uncomfortable. My luggage didi not make the flight due to equipment change. At least. United had it delivered the next day. I was without my toilet items for one day.

My experience is based on one crew member. I had found my seat and sat down but there was a gentleman to claimed to the flight attendant I was in his seat. She then came to me and curtly said, "I need your ticket!" No hi, no excuse me may I see your boarding pass? NOTHING! I was taken aback by her attitude and she repeated herself, "your ticket?!?!" I calmly responded with ok, here you go. Only to discover the gentleman was looking at the wrong boarding pass. She gave me back my ticket with no apology. She then was curt with another man who was putting his coat in the overhead bin, already helped by another flight attendant who said it was fine. She realizes it's ok and then asks him if he drinks. The look on the man's face was priceless. She said she was going to comp him drinks. He gets offered a comp drink for a coat as well as an apology, and I got no apology.

Flight cancelled because of the grounded 737s. United was good about it and got us onto a later Alaska Airlines flight to Oakland (not San Francisco as originally intended). Had to go through security again and my wife dropped her MacBook Pro, which broke, a $2,500 whoopsie. But we made it home.

Delays, excuses, delays, and more delays. This company is BROKEN.

Horrible. Delayed on both planes several times. No attempt to fix it

I contacted both carriers months beforehand to change the cabin (booked in April) but to no avail (united asked to contact Swiss since it was their equipment, Swiss told me to reach out to united). So yeah… My seat was pretty worn down, legroom on 27K was more than enough, but still economy seating so, getting to know your neighbours was easy. According to ground staff, the flight was massively overbooked- and this showed. I ordered a gluten free meal beforehand (which was honoured) but for breakfast got a bread roll and croissant 🤷🏼‍♂️ The connection itself is great. Leaving SFO late PM to arrive at ZRH in the afternoon makes it easier to get re adjusted again. However, and since I’ve flown this connection a couple of times in the past, I will rather deal with one carrier only and include a layover on the east coast.

American Airlines continues to price it can provide the least comfortable passenger experience in the air. This legacy carrier rivals the budgets for both terrible seats and inadequate amenities. I am a 5’7” woman who is not wider than a coach seat (even on these narrow bodied aircraft). My 3.5 hour flight was terribly uncomfortable because the leg room is inadequate (my knees hit the seat on front of me even when it was not reclined); the seat barely reclines; and the foam padding is worn thin to the extent one can feel the metal supports of the seat. Add to this the fact that the aisle is super narrow, so that the drink cart literally scrapes the arm rest of the aisle seat. It’s basically torture.

Somehow I got “offloaded” even though I had my boarding pass and was in transit Food is horrible Staff were nice and cheerful No headphones were provided on 11 hours flight

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

The staff were very helpful with lots of refreshments on offer. The toilets were clean. The seats were comfortable and entertainment was good. No complaints, it was excellent.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Not have to pay for every single item to take a flight. Seating and delays sucked.

The boarding time. I was in Section 1 the lady in charge just let people in section 3 without see us. Make a line , I have to step out and ask her. We were in the line and she just take my ticket and that’s it, so if I don’t ask her she could leave us at the end! We paid more for that privilege and. She doesn’t care….

See my previous comment which is mostly about our flight from Phoenix to SFO

Book cheap flights from St. Louis to San Francisco

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to San Francisco found on KAYAK in the last 72 hours.
5/16Thu
1 stopFrontier
7h 18mSTL-SFO
$55
5/7Tue
1 stopFrontier
9h 08mSTL-SFO
$59
5/21Tue
1 stopDelta
8h 40mSTL-SFO
$129
5/26Sun
1 stopAmerican Airlines
8h 40mSTL-SFO
$179
5/7Tue
2 stopsAlaska Airlines
14h 23mSTL-SFO
$229
5/21Tue
2 stopsAlaska Airlines
13h 50mSTL-SFO
$233
5/14Tue
2 stopsUnited Airlines
18h 16mSTL-SFO
$255
4/30Tue
2 stopsUnited Airlines
13h 50mSTL-SFO
$275
6/10Mon
1 stopDelta
7h 44mSTL-SFO
$344
6/9Sun
2 stopsAmerican Airlines
13h 53mSTL-SFO
$384

Search by stops

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Last minute flights from St. Louis to San Francisco

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to San Francisco that are departing in the next 10 days.
4/25Thu
multi-stopFrontier
10h 44mSTL-SFO
4/27Sat
multi-stopFrontier
10h 31mSFO-STL
$218
4/28Sun
multi-stopAmerican Airlines
7h 32mSTL-SFO
4/29Mon
multi-stopAmerican Airlines
10h 14mSFO-STL
$256
4/25Thu
multi-stopDelta
7h 14mSTL-SFO
4/26Fri
multi-stopDelta
8h 06mSFO-STL
$258
4/28Sun
multi-stopDelta
10h 14mSTL-SFO
4/28Sun
multi-stopDelta
8h 06mSFO-STL
$338
4/28Sun
multi-stop
9h 10mSTL-SFO
4/29Mon
multi-stop
9h 19mSFO-STL
$477
4/25Thu
multi-stopAlaska Airlines
11h 30mSTL-SFO
4/27Sat
multi-stopAlaska Airlines
8h 47mSFO-STL
$678
4/28Sun
multi-stopAlaska Airlines
16h 00mSTL-SFO
4/29Mon
multi-stopAlaska Airlines
26h 35mSFO-STL
$696
4/25Thu
multi-stopAlaska Airlines
11h 55mSTL-SFO
4/27Sat
multi-stopAlaska Airlines
12h 59mSFO-STL
$904

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St. Louis - San Francisco Flights

Departure:

St. Louis (STL)United States

Destination:

San Francisco (SFO)United States

Return flight deals:

San Francisco - St. Louis

Cabin classes: