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Flight Deals

Cheap Frontier Flight Deals to San Francisco

 
Here are some of the best deals found on KAYAK recently from Frontier to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip Frontier flight deals to San Francisco

Mon, Sep 14 - Thu, Sep 17
Frontier Logo
12:07 pm - 1:43 pm
ONT
-
SFO
1h 36mnonstop
Frontier Logo
6:02 pm - 7:36 pm
SFO
-
ONT
1h 34mnonstop
$66Frontier
Sat, Aug 22 - Mon, Aug 24
Frontier Logo
8:48 am - 10:15 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
9:33 am - 11:02 am
SFO
-
ONT
1h 29mnonstop
$68Frontier
Tue, Aug 25 - Thu, Aug 27
Frontier Logo
3:13 pm - 4:40 pm
ONT
-
SFO
1h 27mnonstop
Frontier Logo
9:00 am - 10:29 am
SFO
-
ONT
1h 29mnonstop
$69Frontier
Tue, Aug 25 - Thu, Aug 27
Frontier Logo
3:13 pm - 4:40 pm
ONT
-
SFO
1h 27mnonstop
Frontier Logo
9:00 am - 10:29 am
SFO
-
ONT
1h 29mnonstop
$70Frontier
Mon, Aug 24 - Wed, Aug 26
Frontier Logo
8:48 am - 10:15 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
12:33 pm - 2:03 pm
SFO
-
ONT
1h 30mnonstop
$71Frontier
Fri, Sep 11 - Thu, Sep 17
Frontier Logo
12:07 pm - 1:43 pm
ONT
-
SFO
1h 36mnonstop
Frontier Logo
6:02 pm - 7:36 pm
SFO
-
ONT
1h 34mnonstop
$72Frontier
Sat, Aug 22 - Mon, Aug 24
Frontier Logo
8:48 am - 10:15 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
9:33 am - 11:02 am
SFO
-
ONT
1h 29mnonstop
$73Frontier
Mon, Sep 14 - Mon, Sep 21
Frontier Logo
12:07 pm - 1:43 pm
ONT
-
SFO
1h 36mnonstop
Frontier Logo
6:02 pm - 7:36 pm
SFO
-
ONT
1h 34mnonstop
$74Frontier
Thu, Sep 10 - Thu, Sep 10
Frontier Logo
12:07 pm - 1:43 pm
ONT
-
SFO
1h 36mnonstop
Frontier Logo
6:02 pm - 7:36 pm
SFO
-
ONT
1h 34mnonstop
$76Frontier
Thu, Sep 10 - Mon, Sep 14
Frontier Logo
12:07 pm - 1:43 pm
ONT
-
SFO
1h 36mnonstop
Frontier Logo
6:02 pm - 7:36 pm
SFO
-
ONT
1h 34mnonstop
$77Frontier
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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 $225 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 $66 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 $66 return.

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

Each week there are around 90 direct flights from within the United States to San Francisco. The most common day for departures is Sunday, with 16% 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 $184. On the other hand, the most expensive day to fly is Sunday, where prices are $229 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 $196 on average.

Good to know

Low season

January

Cheapest flight

$28

Average price round-trip

$480

Good deal round-trip

$408
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 17% 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

FAQs for flying to San Francisco with Frontier

  • Is Frontier cheaper than other airlines flying to San Francisco?

    With an average return price of $425, 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 $298.

  • Which other airlines fly to San Francisco?

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

  • How much is a flight to San Francisco with Frontier?

    On average, Frontier flights to San Francisco cost $425 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.

Top tips for your flights to San Francisco with Frontier

  • The cheapest flight to San Francisco with Frontier found on KAYAK in the last 2 weeks departed from Denver and cost $168.
  • 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.

Frontier customer reviews

5.6
Fair2,738 verified ratings
6.6Crew
4.3Entertainment
5.4Comfort
4.5Food
5.9Boarding
Traveler rating:
Sort by:
G
2.0 Poor
See my last review
G
4.0 Mediocre
I know Frontier is a “no-frills” airline. I understand the concept. However, I jumped on some tickets for our family vacation, expecting to play a bit of a game to figure out the family bags and not over spend. In the end, I got the short end of this deal by far. 1. I did not expect them to charge the baggage fee for each direction. It makes the fee look high-ish at a glance, but reasonable. Then when you get to checkout and realize you have to pay it twice to come home with your luggage, it becomes ridiculous. 2. The low checked bag weight limit. I am used to packing a 50lb bag with my preferred airline. Frontier’s artificially low 40lb limit more quickly triggers the extra weight fee, which almost DOUBLES the price of the bag if you go over ($79 for the bag/$75 for the next 10 lbs) 3. The fee for a carry-on bag is the same as a checked bag but with a lower size and weight limit. Make it make sense! 4. The seats are terrible. My 2.5 hour flight almost had me losing my mind. I’m 6’3” and my femurs barely fit in the space provided. My knees had to wiggle just right to jam into the crack next to the armrest of the seat in front of me. The cushioning was thin and inadequate. I am tall but I’m not a freak. These seats are unacceptable. 5. I overheard the woman next to me speaking with the gate agent about being charged a $25 fee for not checking in online - she checked in at the airport counter when she arrived. That’s ridiculous. She was old and in a wheelchair. She had a paper boarding pass, and was obviously not tech savvy. She should not be punished for that. 6. They do not have good placement in the terminals. It was always out on the end or down on a subfloor, and we had to walk out on the tarmac almost every time. In Denver. Their home airport! 7. Every time I loaded a new page on the website while buying my tickets or my bags, it was constantly trying to upsell me on some esoteric bundle. Like, a pop-up every time. Very annoying. 8. No screens in the boarding area (at least where we were) to confirm you’re in the right place. Just static gate number signs. I am sure these are standard practices for Frontier, and I should have read more about them before I purchased tickets, but as a result of this single round trip, I do not plan to ever use this cut-rate airline again. I would rather pay the normal amount for a ticket and be treated like a customer instead of a mark.
A
2.0 Poor
Our flight was delayed 2 hours and when they changed the the time to 1 hour I wasn't alerted and when I checked the gate the plane was still there but they already shut the doors so I had to buy another flight.
A
6.0 Okay
Okay 👍
F
6.0 Okay
Don’t even matter if I write it y'all not going to fix it
A
2.0 Poor
Never again
A
8.0 Very good
Great except upon arrival it took them a long time to open the doors
A
10.0 Wonderful
Like and airlines should be.
A
10.0 Wonderful
Frontier feels like a family I Worked for Eastern Airlines back in the day and I felt the family vibe that I had then. Thank you
L
2.0 Poor
Terrible. Delayed my family flight for several hours affecting family plans
Read more about Frontier

Everything you need to know for your flight to San Francisco