Beginning of main content

Frontier Airlines Flights from St. Louis (STL) to San Francisco (SFO)

Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5
Due to coronavirus (COVID-19) travel advisories, some destinations may be unavailable for certain dates. Find out more.

Wander Wisely with exceptional service, 24/7 support

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Amazing Frontier Airlines STL to SFO Flight Deals

The cheapest flights to San Francisco Intl. found within the past 7 days were $158 round trip and $79 one way. Prices and availability subject to change. Additional terms may apply.

Sun, Jan 24 -
STL
St. Louis
to
SFO
San Francisco
$79

One way

found 6 hours ago

Open STL to SFO flights search result page
Sun, Jan 24 -
STL
St. Louis
to
SFO
San Francisco
$85

One way

found 6 hours ago

Open STL to SFO flights search result page
Sun, Dec 13 -
STL
St. Louis
to
SFO
San Francisco
$94

One way

found 6 hours ago

Open STL to SFO flights search result page
Mon, Dec 14 -
STL
St. Louis
to
SFO
San Francisco
$100

One way

found 6 hours ago

Open STL to SFO flights search result page
Sun, Dec 13 -
STL
St. Louis
to
SFO
San Francisco
$120

One way

found 6 hours ago

Open STL to SFO flights search result page
Mon, Dec 28 -
STL
St. Louis
to
SFO
San Francisco
$124

One way

found 8 hours ago

Open STL to SFO flights search result page
Sun, Dec 6 -
STL
St. Louis
to
SFO
San Francisco
$154

One way

found 5 hours ago

Open STL to SFO flights search result page
Sat, Dec 19 - Thu, Dec 31
STL
St. Louis
to
SFO
San Francisco
$158

Roundtrip

found 11 hours ago

Open STL to SFO flights search result page
Fri, Dec 18 -
STL
St. Louis
to
SFO
San Francisco
$164

One way

found 20 hours ago

Open STL to SFO flights search result page
Sat, Dec 19 - Mon, Dec 28
STL
St. Louis
to
SFO
San Francisco
$173

Roundtrip

found 1 day ago

Open STL to SFO flights search result page
Mon, Dec 21 - Mon, Dec 28
STL
St. Louis
to
SFO
San Francisco
$203

Roundtrip

found 1 day ago

Open STL to SFO flights search result page
Mon, Dec 28 - Sat, Jan 2
STL
St. Louis
to
SFO
San Francisco
$218

Roundtrip

found 3 days ago

Open STL to SFO flights search result page
Sun, Dec 13 -
STL
St. Louis
to
SFO
San Francisco
$94

One way

found 6 hours ago

Open STL to SFO flights search result page
Mon, Dec 14 -
STL
St. Louis
to
SFO
San Francisco
$100

One way

found 6 hours ago

Open STL to SFO flights search result page
Sun, Dec 13 -
STL
St. Louis
to
SFO
San Francisco
$120

One way

found 6 hours ago

Open STL to SFO flights search result page
Mon, Dec 28 -
STL
St. Louis
to
SFO
San Francisco
$124

One way

found 8 hours ago

Open STL to SFO flights search result page
Sun, Dec 6 -
STL
St. Louis
to
SFO
San Francisco
$154

One way

found 5 hours ago

Open STL to SFO flights search result page
Sat, Dec 19 - Thu, Dec 31
STL
St. Louis
to
SFO
San Francisco
$158

Roundtrip

found 11 hours ago

Open STL to SFO flights search result page
Fri, Dec 18 -
STL
St. Louis
to
SFO
San Francisco
$164

One way

found 20 hours ago

Open STL to SFO flights search result page
Sat, Dec 19 - Mon, Dec 28
STL
St. Louis
to
SFO
San Francisco
$173

Roundtrip

found 1 day ago

Open STL to SFO flights search result page
Mon, Dec 21 - Mon, Dec 28
STL
St. Louis
to
SFO
San Francisco
$203

Roundtrip

found 1 day ago

Open STL to SFO flights search result page
Mon, Dec 28 - Sat, Jan 2
STL
St. Louis
to
SFO
San Francisco
$218

Roundtrip

found 3 days ago

Open STL to SFO flights search result page
Sun, Jan 24 -
STL
St. Louis
to
SFO
San Francisco
$79

One way

found 6 hours ago

Open STL to SFO flights search result page
Sun, Jan 24 -
STL
St. Louis
to
SFO
San Francisco
$85

One way

found 6 hours ago

Open STL to SFO flights search result page

FAQs about Frontier Airlines Flights from STL to SFO

What terminal is Frontier Airlines at St. Louis Lambert International Airport?

Before you jet off from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) with Frontier Airlines, it might be a good idea to get in touch with the airline for your terminal information. While your ticket should have some of the details, there's no guarantee.

Are there Frontier Airlines non-stop flights from STL to SFO?

As you can't fly nonstop from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) with Frontier Airlines, make the most of your stopover. Shout yourself a couple of refreshments at an airport bar, or go for a wander around the terminal and indulge in some retail therapy.

How long is a Frontier Airlines flight from STL to SFO?

Your Frontier Airlines flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) should take about 5 hours and 34 minutes. There are many things you can do to pass the time. Asking the passenger next to you about their amazing travel experiences is one of them. If you'd prefer a different type of in-flight entertainment, you could always watch a film.

How many direct and indirect flights does Frontier Airlines fly from STL to SFO?

You'll have a few options if you choose to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) with Frontier Airlines. The airline operates 26 services on this route per month.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to San Francisco, CA (SFO-San Francisco Intl.), please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start of the week is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2019, flights departing on a Tuesday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2019. Savings are subject to change based on departure location, date and destination.

Popular Frontier Airlines Flight Routes from STL

Top Frontier Airlines Flight Routes from SFO

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.