Is Frontier cheaper than other airlines flying to San Francisco?

With an average return price of $409, Frontier is cheaper than Alaska Airlines and United Airlines when it comes to flights to San Francisco. However, the cheapest airline flying to San Francisco is Breeze Airways, with an average return price of $307.

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, Breeze Airways, Southwest and Alaska Airlines.

How much is a flight to San Francisco with Frontier?

On average, Frontier flights to San Francisco cost $409 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 $28

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Frontier Flight Deals to San Francisco

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

Round-trip

One-way

Last minute

Direct

Recent round-trip Frontier flight deals to San Francisco

Fri, Sep 4 - Mon, Sep 14

8:48 am - 10:15 am

ONT

SFO

1h 27mnonstop

12:31 pm - 2:00 pm

SFO

ONT

1h 29mnonstop

$92Frontier

Fri, Aug 7 - Wed, Aug 12

8:58 am - 10:25 am

ONT

SFO

1h 27mnonstop

11:15 am - 12:48 pm

SFO

ONT

1h 33mnonstop

$93Frontier

Fri, Aug 21 - Mon, Aug 24

8:48 am - 10:15 am

ONT

SFO

1h 27mnonstop

9:33 am - 11:02 am

SFO

ONT

1h 29mnonstop

$94Frontier

Thu, Aug 20 - Mon, Aug 24

6:55 am - 4:36 pm

LAX

SFO

9h 41m

1 stop

8:23 pm - 9:54 pm

SFO

LAX

1h 31mnonstop

$95Frontier

Thu, Aug 6 - Wed, Aug 12

8:58 am - 10:25 am

ONT

SFO

1h 27mnonstop

11:15 am - 12:48 pm

SFO

ONT

1h 33mnonstop

$95Frontier

Sat, Aug 1 - Sat, Aug 15

7:07 pm - 8:45 pm

LAX

SFO

1h 38mnonstop

8:23 pm - 9:54 pm

SFO

LAX

1h 31mnonstop

$96Frontier

Thu, Aug 6 - Sat, Aug 8

8:58 am - 10:25 am

ONT

SFO

1h 27mnonstop

9:33 am - 11:02 am

SFO

ONT

1h 29mnonstop

$96Frontier

Thu, Aug 20 - Fri, Aug 21

7:07 pm - 8:40 pm

LAX

SFO

1h 33mnonstop

8:23 pm - 9:54 pm

SFO

LAX

1h 31mnonstop

$97Frontier

Thu, Aug 20 - Sat, Aug 22

7:07 pm - 8:40 pm

LAX

SFO

1h 33mnonstop

8:23 pm - 9:54 pm

SFO

LAX

1h 31mnonstop

$98Frontier

Thu, Aug 20 - Mon, Aug 24

6:55 am - 4:36 pm

LAX

SFO

9h 41m

1 stop

8:23 pm - 9:54 pm

SFO

LAX

1h 31mnonstop

$99Frontier

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 September, where tickets cost $136 (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 $253 and $216 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 $28 one-way, and $92 round-trip on the route from Ontario to San Francisco. The most popular route is from Los Angeles to San Francisco and the cheapest ticket found on this route in the last 5 days was $95 return.

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

Each week there are around 89 direct flights from within the United States to San Francisco. The most common day for departures is Monday, with 15% 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 $182. On the other hand, the most expensive day to fly is Sunday, where prices are $221 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 afternoon, when flights cost $190 on average.

Low season	January
High season	July
Cheapest flight	$28
Average price round-trip	$410
Good deal round-trip	$349

Best time to beat the crowds with an average 16% drop in price.

Most popular time to fly with an average 13% increase in price.

Flight from Ontario to San Francisco

(avg. price over the last 2 weeks)

or less

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?
With an average return price of $409, Frontier is cheaper than Alaska Airlines and United Airlines when it comes to flights to San Francisco. However, the cheapest airline flying to San Francisco is Breeze Airways, with an average return price of $307.
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, Breeze Airways, Southwest and Alaska Airlines.
How much is a flight to San Francisco with Frontier?
On average, Frontier flights to San Francisco cost $409 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 Las Vegas and cost $118.
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 July and prices are highest at this time. The cheapest month to fly is January.

5.6

Fair2,817 verified ratings

6.6Crew

4.5Food

5.4Comfort

5.9Boarding

4.3Entertainment

10.0 Wonderful

Deidre, Jul 2026

The flight was great . But you only had one vegan item on the whole flight and someone prior to me took it . I was so disappointed cause I came in from the flooded area and couldn’t pick up anything prior to my flight .

2.0 Poor

Anonymous, Jul 2026

I really didn't like anything. Paid for my checked luggage online ($79) and then was told that I would have to paid another $79 for my carry on. Was not allowed to enter the terminal until 3 hours before my flight and when I finally was allowed to check my bag and enter, my flight was delayed 3 times. When I finally landed, we were all instructed to "run off the plane" as they had to do a quick turn around to Las Vegas. Me and several of my flying companions will never fly Frontier again.

10.0 Wonderful

Anonymous, Jul 2026

All was great

10.0 Wonderful

kami, Jul 2026

I paid for the upgraded bundle. Was worth it! Great experience round trip!

8.0 Very good

Lawrence, Jul 2026

Flight was 40 mins delayed . Crew was fabulous

2.0 Poor

Katie, Jul 2026

It was awful everything about it terrible I will never ever ever ride it again

2.0 Poor

Katie, Jul 2026

It was awful ....my first time flying on it and I will NEVER fly it again ....everything about it was terrible .....most especially the flight attendants

10.0 Wonderful

Deidre, Jun 2026

Great

6.0 Okay

Katherine, Jun 2026

Crew was kind of grumpy and there was no beverage service at all. Sodas were $4. Disappointing.

6.0 Okay

Linda, May 2026

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

Everything you need to know for your flight to San Francisco

Airlines

Airports

Cabin class

Complete your trip

Flights to other cities

Frontier flights

Origins

Other airports

Return flight deals

Other airlines flying to San Francisco

United Airlines flights to San Francisco

Alaska Airlines flights to San Francisco

Delta flights to San Francisco

American Airlines flights to San Francisco

Southwest flights to San Francisco

SFO

Find cheap Frontier flights to San Francisco from $28 - Compare and Save

Cheap Frontier Flight Deals to San Francisco

Recent round-trip Frontier flight deals to San Francisco

Recent one-way Frontier flight deals to San Francisco

Recent last minute Frontier flight deals to San Francisco

Recent direct Frontier flight deals to San Francisco

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?

Good to know

When to book flights with Frontier to San Francisco

FAQs for flying to San Francisco with Frontier

Top tips for your flights to San Francisco with Frontier

Frontier customer reviews

Traveler rating:

Sort by:

Everything you need to know for your flight to San Francisco

Other airlines flying to San Francisco

Information on the airport you'll fly into in San Francisco

Cabin class types available on flights to San Francisco

Complete your trip to San Francisco with a hotel stay or car rental

Flights to other popular destinations

Top Frontier flights

Flights from domestic origins to San Francisco

Choose which airport to fly into in San Francisco

Find deals for your return flight