$84+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SFO
Apr 9 — Apr 161
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to San Francisco with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Lambert-St Louis to San Francisco are usually found in August or October, booked 44 days in advance, depart on a Thursday or Friday and return on a Tuesday
Cheap flight deals from St. Louis to San Francisco
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to San FranciscoExplore 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 March 10, 2026.
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 March 10, 2026.
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:21 am
STL
- SFO
1 stop9h 58m
Frontier
Sat 4/186:00 am
SFO
- STL
1 stop11h 32m
Frontier
Deal found 3/9![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3112:14 pm
STL
- SFO
1 stop8h 23m
Frontier
Wed 4/810:14 pm
SFO
- STL
2 stops33h 34m
Frontier
Deal found 3/6![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- SFO
1 stop6h 12m
Frontier
Tue 4/146:00 am
SFO
- STL
2 stops22h 50m
Frontier
Deal found 3/6![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 3/6. 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.
Mon 3/2312:16 pm
STL
- SFO
1 stop8h 58m
Frontier
Tue 3/319:04 pm
SFO
- STL
1 stop10h 44m
Frontier
Deal found 3/6![Frontier logo]()
$230
This Frontier deal was found by Cheapflights users on 3/8. 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.
Wed 4/88:16 pm
STL
- SFO
1 stop6h 12m
Frontier
Sun 4/129:00 pm
SFO
- STL
1 stop10h 48m
Frontier
Deal found 3/8![Frontier logo]()
$232
This Trip.com deal was found by Cheapflights users on 3/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/308:12 pm
STL
- SFO
1 stop6h 16m
Frontier
Mon 4/610:03 pm
SFO
- STL
1 stop10h 27m
Frontier
Deal found 3/6![Frontier logo]()
$233
This Frontier deal was found by Cheapflights users on 3/5. 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 4/210:12 pm
STL
- SFO
1 stop11h 46m
Frontier
Tue 4/79:00 pm
SFO
- STL
1 stop10h 48m
Frontier
Deal found 3/5![Frontier logo]()
$235
This Expedia deal was found by Cheapflights users on 3/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:55 pm
STL
- SFO
1 stop12h 03m
Frontier
Mon 4/276:00 am
SFO
- STL
1 stop11h 32m
Frontier
Deal found 3/5![Frontier logo]()
$240
This Booking.com deal was found by Cheapflights users on 3/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2611:21 am
STL
- SFO
1 stop9h 53m
Frontier
Wed 4/110:14 pm
SFO
- STL
1 stop21h 03m
Frontier
Deal found 3/5![Frontier logo]()
$241
This Frontier deal was found by Cheapflights users on 3/5. 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 3/2611:21 am
STL
- SFO
1 stop9h 53m
Frontier
Mon 3/3010:48 pm
SFO
- STL
1 stop10h 31m
Frontier
Deal found 3/5![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- SFO
1 stop6h 12m
Frontier
Mon 4/1310:50 pm
SFO
- STL
2 stops46h 29m
Frontier
Deal found 3/5![Frontier logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/210:12 pm
STL
- SFO
1 stop11h 46m
Frontier
Wed 4/152:47 pm
SFO
- STL
2 stops26h 34m
Frontier
Deal found 3/5![Frontier logo]()
$246
Best flights from St. Louis to San FranciscoDiscover carefully curated flight deals from St. Louis to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 10, 2026.
Discover carefully curated flight deals from St. Louis to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 10, 2026.
This Delta deal was found by Cheapflights users on 3/6. 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.
Wed 5/66:20 am
STL
- SFO
2 stops11h 39m
Delta
Mon 5/114:53 pm
SFO
- STL
1 stop5h 37m
Delta
Deal found 3/6![Delta logo]()
$342
This Southwest deal was found by Cheapflights users on 3/9. 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.
Fri 4/178:25 am
STL
- SFO
Nonstop4h 20m
Southwest
Mon 4/2011:25 pm
SFO
- STL
1 stop8h 05m
Southwest
Deal found 3/9![Southwest logo]()
$393
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Fri 4/177:05 pm
STL
- SFO
Nonstop4h 45m
United Airlines
Mon 4/2011:20 pm
SFO
- STL
Nonstop4h 30m
United Airlines
Deal found 3/9![United Airlines logo]()
$403
This Delta deal was found by Cheapflights users on 3/8. 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 4/73:05 pm
STL
- SFO
2 stops10h 52m
Delta
Tue 4/1410:32 am
SFO
- STL
2 stops11h 53m
Delta
Deal found 3/8![Delta logo]()
$345
This Southwest deal was found by Cheapflights users on 3/6. 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 4/810:15 am
STL
- SFO
2 stops9h 15m
Southwest
Tue 4/148:55 am
SFO
- STL
2 stops8h 20m
Southwest
Deal found 3/6![Southwest logo]()
$413
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Thu 6/47:23 pm
STL
- SFO
Nonstop4h 20m
United Airlines
Sun 6/75:05 am
SFO
- STL
1 stop8h 41m
United Airlines
Deal found 3/6![United Airlines logo]()
$427
This Delta deal was found by Cheapflights users on 3/6. 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 4/162:20 pm
STL
- SFO
2 stops11h 17m
Delta
Sun 4/195:40 am
SFO
- STL
1 stop5h 43m
Delta
Deal found 3/6![Delta logo]()
$404
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Wed 4/156:00 am
STL
- SFO
1 stop8h 18m
United Airlines
Sun 4/1911:20 pm
SFO
- STL
Nonstop4h 30m
United Airlines
Deal found 3/9![United Airlines logo]()
$431
This Delta deal was found by Cheapflights users on 3/9. 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 4/231:46 pm
STL
- SFO
1 stop10h 40m
Delta
Mon 4/275:59 am
SFO
- STL
2 stops9h 27m
Delta
Deal found 3/9![Delta logo]()
$407
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Wed 5/610:25 am
STL
- SFO
1 stop10h 13m
United Airlines
Mon 5/1111:20 pm
SFO
- STL
Nonstop4h 27m
United Airlines
Deal found 3/6![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 3/8. 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.
Wed 6/33:11 pm
STL
- SFO
2 stops10h 52m
Delta
Sun 6/79:30 pm
SFO
- STL
1 stop8h 37m
Delta
Deal found 3/8![Delta logo]()
$445
Last-minute flights from St. Louis to San FranciscoDiscover last-minute flight deals from St. Louis to San Francisco. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to San Francisco. Data last updated March 10, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/6. 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.
Mon 3/2312:16 pm
STL
- SFO
1 stop8h 58m
Frontier
Tue 3/319:04 pm
SFO
- STL
1 stop10h 44m
Frontier
Deal found 3/6![Frontier logo]()
$230
This Booking.com deal was found by Cheapflights users on 3/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2611:21 am
STL
- SFO
1 stop9h 53m
Frontier
Wed 4/110:14 pm
SFO
- STL
1 stop21h 03m
Frontier
Deal found 3/5![Frontier logo]()
$241
This Frontier deal was found by Cheapflights users on 3/5. 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 3/2611:21 am
STL
- SFO
1 stop9h 53m
Frontier
Mon 3/3010:48 pm
SFO
- STL
1 stop10h 31m
Frontier
Deal found 3/5![Frontier logo]()
$244
This Trip.com deal was found by Cheapflights users on 3/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/308:12 pm
STL
- SFO
1 stop6h 16m
Frontier
Mon 4/610:03 pm
SFO
- STL
1 stop10h 27m
Frontier
Deal found 3/6![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3112:14 pm
STL
- SFO
1 stop8h 23m
Frontier
Wed 4/810:14 pm
SFO
- STL
2 stops33h 34m
Frontier
Deal found 3/6![Frontier logo]()
$228
This Frontier deal was found by Cheapflights users on 3/5. 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 4/210:12 pm
STL
- SFO
1 stop11h 46m
Frontier
Tue 4/79:00 pm
SFO
- STL
1 stop10h 48m
Frontier
Deal found 3/5![Frontier logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/210:12 pm
STL
- SFO
1 stop11h 46m
Frontier
Wed 4/152:47 pm
SFO
- STL
2 stops26h 34m
Frontier
Deal found 3/5![Frontier logo]()
$246
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:21 am
STL
- SFO
1 stop9h 58m
Frontier
Sat 4/186:00 am
SFO
- STL
1 stop11h 32m
Frontier
Deal found 3/9![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- SFO
1 stop6h 12m
Frontier
Tue 4/146:00 am
SFO
- STL
2 stops22h 50m
Frontier
Deal found 3/6![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 3/8. 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.
Wed 4/88:16 pm
STL
- SFO
1 stop6h 12m
Frontier
Sun 4/129:00 pm
SFO
- STL
1 stop10h 48m
Frontier
Deal found 3/8![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:16 pm
STL
- SFO
1 stop6h 12m
Frontier
Mon 4/1310:50 pm
SFO
- STL
2 stops46h 29m
Frontier
Deal found 3/5![Frontier logo]()
$245
This Expedia deal was found by Cheapflights users on 3/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/239:55 pm
STL
- SFO
1 stop12h 03m
Frontier
Mon 4/276:00 am
SFO
- STL
1 stop11h 32m
Frontier
Deal found 3/5![Frontier logo]()
$240
One-way flights from St. Louis to San FranciscoSearch for one-way flight options from St. Louis to San Francisco. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
Search for one-way flight options from St. Louis to San Francisco. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:19 pm
STL
- SFO
1 stop29h 06m
Frontier
Deal found 3/6![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:06 pm
STL
- SFO
1 stop6h 21m
Frontier
Deal found 3/6![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 3/6. 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.
Tue 3/2411:27 am
STL
- SFO
1 stop9h 47m
Frontier
Deal found 3/6![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3112:14 pm
STL
- SFO
1 stop8h 23m
Frontier
Deal found 3/7![Frontier logo]()
$96
This Super.com deal was found by Cheapflights users on 3/9. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/258:17 pm
STL
- SFO
1 stop14h 56m
Frontier
Deal found 3/9![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 3/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/149:55 pm
STL
- SFO
1 stop12h 23m
Frontier
Deal found 3/10![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:12 pm
STL
- SFO
2 stops40h 54m
Frontier
Deal found 3/6![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/68:19 pm
STL
- SFO
2 stops26h 49m
Frontier
Deal found 3/6![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:06 pm
STL
- SFO
1 stop6h 21m
Frontier
Deal found 3/10![Frontier logo]()
$103
This Trip.com deal was found by Cheapflights users on 3/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/49:55 pm
STL
- SFO
1 stop18h 31m
Frontier
Deal found 3/6![Frontier logo]()
$104
Find 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 March 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $226 (Trip.com) |
One-way from | $84 (Kiwi.com) |
Popular in | March |
Cheapest in | August |
Average price | $543 |
Good round-trip deal | $482 or less |
Good one-way deal | $311 or less |
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 March 10, 2026.
Use the filters below to find and compare flights from St. Louis to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Wed 5/6
6:20 am-3:59 pm
2 stops11h 39m
San Francisco
Mon 5/11
4:53 pm-12:30 am
1 stop5h 37m
$342
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Tue 4/7
3:05 pm-11:57 pm
2 stops10h 52m
San Francisco
Tue 4/14
10:32 am-12:25 am
2 stops11h 53m
$345
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Fri 4/17
8:25 am-10:45 am
Nonstop4h 20m
San Francisco
Mon 4/20
11:25 pm-9:30 am
1 stop8h 05m
$393
Quickest round-trip
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Fri 4/17
7:05 pm-9:50 pm
Nonstop4h 45m
San Francisco
Mon 4/20
11:20 pm-5:50 am
Nonstop4h 30m
$403
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Thu 4/16
2:20 pm-11:37 pm
2 stops11h 17m
San Francisco
Sun 4/19
5:40 am-1:23 pm
1 stop5h 43m
$404
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Thu 4/23
1:46 pm-10:26 pm
1 stop10h 40m
San Francisco
Mon 4/27
5:59 am-5:26 pm
2 stops9h 27m
$407
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Wed 4/8
10:15 am-5:30 pm
2 stops9h 15m
San Francisco
Tue 4/14
8:55 am-7:15 pm
2 stops8h 20m
$413
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Thu 6/4
7:23 pm-9:43 pm
Nonstop4h 20m
San Francisco
Sun 6/7
5:05 am-3:46 pm
1 stop8h 41m
$427
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Wed 4/15
6:00 am-12:18 pm
1 stop8h 18m
San Francisco
Sun 4/19
11:20 pm-5:50 am
Nonstop4h 30m
$431
St. LouisSan Francisco
STL - SFO
STLSFO
Lambert-St Louis
Wed 6/3
3:11 pm-12:03 am
2 stops10h 52m
San Francisco
Sun 6/7
9:30 pm-8:07 am
1 stop8h 37m
$445
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from St. Louis to San Francisco
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 St. Louis to San Francisco in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on St. Louis-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-San Francisco flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-San Francisco 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 St. Louis-San Francisco 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 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.
STL-SFO
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 March 6, 2026.
The best time to book flights from St. Louis to San Francisco is 44 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, August is the cheapest month in which you can book a flight from St. Louis to San Francisco (average of $121). Flying from St. Louis to San Francisco in May is currently the most expensive (average of $256). 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 March 10, 2026.
It’s typically best to fly out from St. Louis to San Francisco at noon. Doing so could potentially save you 59% on the flight price compared to flying in the evening, which is usually more expensive.
The best insider tips for St. Louis to San Francisco flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to San Francisco trip
Our travel experts
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 March 10, 2026.
Read through reviews of airlines operating flights from St. Louis to San Francisco, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Entertainment
7.5
Comfort
8.0
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
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.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Clara
Santa Cruz
Livermore
Roseville
Watsonville
San Bruno
Sunnyvale
Vacaville
Turlock
San Carlos
San Ramon
Redwood City
Daly City
Rancho Cordova
San Lorenzo
Davis
Hollister
Manteca
Union City
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
San Francisco flight routes
Alternative routes for St. Louis to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to San Francisco by cabin class
Find flights from St. Louis to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and San Francisco flights
Browse other St. Louis and San Francisco flight options. Last updated on March 10, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on March 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 10, 2026.
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 March 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$121 | Average$238 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$180 | Average$369 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$236 | Average$376 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$289 | Average$458 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$324 | Average$495 | FlexibilityNo cancel fee | On-time63% |