$350 Cheap United flights San Francisco (SFO) to St. Louis (STL)

View $350 flight on Mon, Dec 29, 2025Opens in a new window

$350 Cheap United flights San Francisco (SFO) to St. Louis (STL)

Prices were available within the past 7 days and start at $350 for one-way flights and $621 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Dec 29 - Wed, Dec 31
SFO
San Francisco
STL
St. Louis
$621 Roundtrip, found 12 hours ago
$621
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Dec 29 from San Francisco to St. Louis, returning Wed, Dec 31, priced at $621 found 12 hours ago
United
Mon, Dec 29 - Wed, Dec 31
SFO
San Francisco
STL
St. Louis
$624 Roundtrip, found 12 hours ago
$624
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Dec 29 from San Francisco to St. Louis, returning Wed, Dec 31, priced at $624 found 12 hours ago
United
Wed, Dec 31 - Thu, Jan 1
SFO
San Francisco
STL
St. Louis
$625 Roundtrip, found 12 hours ago
$625
Roundtrip
found 12 hours ago
Select United flight, departing Wed, Dec 31 from San Francisco to St. Louis, returning Thu, Jan 1, priced at $625 found 12 hours ago
United
Sun, Dec 28 - Thu, Jan 1
SFO
San Francisco
STL
St. Louis
$792 Roundtrip, found 12 hours ago
$792
Roundtrip
found 12 hours ago
Select United flight, departing Sun, Dec 28 from San Francisco to St. Louis, returning Thu, Jan 1, priced at $792 found 12 hours ago

Find the cheapest month to fly from San Francisco (SFO) to St. Louis (STL)

February is typically the cheapest month to fly

From $120 - $404 per traveler.

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $352
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $352
Flights from San Francisco (SFO) to St. Louis (STL)
Origin airport
San Francisco Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
2771 km
Average flight time
5 hours 54 mins