Is Frontier cheaper than other airlines flying to San Francisco?

Frontier is the cheapest airline flying to San Francisco with an average return price of $422. Flights to San Francisco with Breeze Airways cost $440 on average, while United Airlines cost $659.

Which other airlines fly to San Francisco?

Along with Frontier, you can also fly to San Francisco with United Airlines, United Airlines, Alaska Airlines, American Airlines, Breeze Airways, Southwest and Breeze Airways.

How much is a flight to San Francisco with Frontier?

On average, Frontier flights to San Francisco cost $422 for a round-trip.

Which airport do Frontier flights to San Francisco fly into?

You’ll fly into San Francisco Airport when flying to San Francisco with Frontier.

Frontier flights to San Francisco (SFO) from $34

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Cheap Frontier Flight Deals to San Francisco

Discover the best prices for you by selecting your travel dates on KAYAK.

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Recent round-trip Frontier flight deals to San Francisco

Mon, Oct 19 - Mon, Oct 19

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$58Frontier

Fri, Oct 23 - Fri, Oct 23

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$60Frontier

Thu, Sep 24 - Mon, Sep 28

12:07 pm - 1:43 pmONT Ontario-SFO San Francisco

1h 36mnonstop

6:02 pm - 7:36 pmSFO San Francisco-ONT Ontario

1h 34mnonstop

$64Frontier

Thu, Oct 22 - Thu, Oct 29

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:28 pmSFO San Francisco-ONT Ontario

1h 26mnonstop

$65Frontier

Mon, Oct 19 - Thu, Oct 22

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$66Frontier

Sun, Sep 20 - Mon, Sep 21

12:07 pm - 1:43 pmONT Ontario-SFO San Francisco

1h 36mnonstop

6:02 pm - 7:36 pmSFO San Francisco-ONT Ontario

1h 34mnonstop

$67Frontier

Sun, Oct 25 - Sun, Oct 25

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$73Frontier

Thu, Oct 8 - Fri, Oct 9

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$74Frontier

Fri, Oct 23 - Sun, Oct 25

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$75Frontier

Thu, Oct 15 - Thu, Oct 22

12:01 pm - 1:32 pmONT Ontario-SFO San Francisco

1h 31mnonstop

6:02 pm - 7:40 pmSFO San Francisco-ONT Ontario

1h 38mnonstop

$76Frontier

Useful Info

KAYAK's insights & trends for San Francisco flights with Frontier

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

What is the cheapest month to fly with Frontier to San Francisco?

The cheapest month for Frontier flights to San Francisco is February, where tickets cost $146 (return) on average. On the other hand, the most expensive months to fly this route on Frontier are June and July, where the average cost of round-trip tickets is $254 and $243 respectively.

How far in advance should I book Frontier flights to San Francisco?

For the absolute cheapest price on Frontier, our data suggests you should book 4 weeks before departure.

What is the cheapest flight to San Francisco with Frontier?

The cheapest airline ticket to San Francisco from the United States with Frontier in the last 5 days was $34 one-way, and $58 round-trip on the route from Ontario to San Francisco. The most popular route is from Ontario to San Francisco and the cheapest ticket found on this route in the last 5 days was $58 return.

How many direct flights does Frontier operate to San Francisco every week?

Each week there are around 97 direct flights from within the United States to San Francisco. The most common day for departures is Sunday, with 19% of flights taking off on this day.

What is the cheapest day to fly to San Francisco?

Based on KAYAK data, the cheapest day to fly to San Francisco is Friday where tickets can be as cheap as $196. On the other hand, the most expensive day to fly is Sunday, where prices are $238 on average.

What is the cheapest time of day to fly to San Francisco with Frontier?

The cheapest time of day to fly to San Francisco with Frontier is generally in the morning, when flights cost $203 on average.

Low season	January
High season	October
Cheapest flight	$41
Average price round-trip	$247

Best time to beat the crowds with an average 21% drop in price.

Most popular time to fly and prices are also 14% lower on average.

Flight from Ontario to San Francisco

(price for this month)

When to book flights with Frontier to San Francisco

Average price per month

Flight prices as travel date approaches

Is Frontier cheaper than other airlines flying to San Francisco?
Frontier is the cheapest airline flying to San Francisco with an average return price of $422. Flights to San Francisco with Breeze Airways cost $440 on average, while United Airlines cost $659.
Which other airlines fly to San Francisco?
Along with Frontier, you can also fly to San Francisco with United Airlines, United Airlines, Alaska Airlines, American Airlines, Breeze Airways, Southwest and Breeze Airways.
How much is a flight to San Francisco with Frontier?
On average, Frontier flights to San Francisco cost $422 for a round-trip.
Which airport do Frontier flights to San Francisco fly into?
You’ll fly into San Francisco Airport when flying to San Francisco with Frontier.

The cheapest flight to San Francisco with Frontier found on KAYAK in the last 2 weeks departed from Dallas/Fort Worth Airport and cost $197.
If you’re intending to fly with Frontier, book your flight to San Francisco at least 2 weeks before departure to ensure a below-average price.
High season for flights to San Francisco with Frontier is October and prices are highest at this time. The cheapest month to fly is January.

5.6

Fair2,613 verified ratings

5.9Boarding

4.5Food

6.5Crew

5.4Comfort

4.2Entertainment

2.0 Poor

-eLa, Sep 2026

Flight was delayed by about an hour, once we arrived at LAX we had to take a shuttle to the baggage claim - it was completely disorganized. The agents at the shuttles were rude and unable to provide any information. Frontier charges extra for everything from bags to drinks - at the end it ends up being more expensive than flying the better airlines

2.0 Poor

Kurt, Aug 2026

Sat in the airport waiting for my flight for 5 hours. Finally got on the plane only to be thrown off and told that my flight was cancelled. Zero customer service. Nobody spoke to us. Just the worst

2.0 Poor

John, Aug 2026

3+ hour delay on a direct flight is never ideal.

2.0 Poor

Anonymous, Aug 2026

When I was boarding my departure from Raleigh to Orlando I was inappropriately scolded by a female dog named Mia because I didn’t pay in advance for my carry on bag ($75). Frontiers website is confusing regarding pre-paying for carryons so it was a simple mistake. I also had paid for “upfront plus” meaning me and my son were seated in the front row with no one in the middle seat ($450 upgrade). When we were boarding Mia said “sir, you didn’t pay for your carryon” in a not so polite tone and told me to get out of line and come back to the counter to pay for my carryon. The way they had the retractable rope left me no room to circle back without making the people behind me move so I just stood there and then she said a second time “sir!! Go pay for your carryon” in an embarrassing tone. I then moved their rope so I could get back to the counter when a second female dog then asked “are you done!?!?” because I had said “do you want me to bulldoze the people behind me?” I then said you do realize I paid over $400 for upfront plus so I was certainly not trying to sneak a carryon bag without paying. Long story short, I am soooo done with discount airlines!!! By the time you pay for all the “extras” you might as well have paid for Delta Southwest or American! Frontier airlines sucks and I was embarrassed by a female dog named Mia!!!

4.0 Mediocre

Wissam, Aug 2026

No reclining seats

8.0 Very good

Anonymous, Aug 2026

Friendly service. No charges for phones.

8.0 Very good

Noel, Aug 2026

Great services

2.0 Poor

Anonymous, Aug 2026

They cancelled my flight

10.0 Wonderful

Joe, Aug 2026

Frontier is good until they cancel your flight. Way too many cancellations.

2.0 Poor

Gregory, Aug 2026

See my last review

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KAYAK's insights & trends for San Francisco flights with Frontier

What is the cheapest month to fly with Frontier to San Francisco?

How far in advance should I book Frontier flights to San Francisco?

What is the cheapest flight to San Francisco with Frontier?

How many direct flights does Frontier operate to San Francisco every week?

What is the cheapest day to fly to San Francisco?

What is the cheapest time of day to fly to San Francisco with Frontier?

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