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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

Thu, Sep 3 - Sun, Sep 6
Frontier Logo
8:48 am - 10:15 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
9:00 am - 10:29 am
SFO
-
ONT
1h 29mnonstop
$76Frontier
Thu, Sep 3 - Fri, Sep 11
Frontier Logo
8:48 am - 10:15 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
12:31 pm - 2:00 pm
SFO
-
ONT
1h 29mnonstop
$79Frontier
Thu, Sep 3 - Sun, Sep 6
Frontier Logo
8:48 am - 10:15 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
9:00 am - 10:29 am
SFO
-
ONT
1h 29mnonstop
$81Frontier
Tue, Aug 18 - Mon, Aug 31
Frontier Logo
3:13 pm - 4:40 pm
ONT
-
SFO
1h 27mnonstop
Frontier Logo
9:33 am - 11:02 am
SFO
-
ONT
1h 29mnonstop
$84Frontier
Sat, Aug 22 - Wed, Sep 2
Frontier Logo
8:48 am - 10:15 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
12:33 pm - 2:03 pm
SFO
-
ONT
1h 30mnonstop
$86Frontier
Tue, Aug 18 - Wed, Aug 19
Frontier Logo
3:13 pm - 4:40 pm
ONT
-
SFO
1h 27mnonstop
Frontier Logo
12:33 pm - 2:03 pm
SFO
-
ONT
1h 30mnonstop
$87Frontier
Tue, Aug 11 - Tue, Aug 18
Frontier Logo
8:58 am - 10:25 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
12:33 pm - 2:03 pm
SFO
-
ONT
1h 30mnonstop
$88Frontier
Mon, Aug 17 - Wed, Aug 19
Frontier Logo
8:58 am - 10:25 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
12:33 pm - 2:03 pm
SFO
-
ONT
1h 30mnonstop
$89Frontier
Thu, Aug 13 - Tue, Aug 18
Frontier Logo
8:58 am - 10:25 am
ONT
-
SFO
1h 27mnonstop
Frontier Logo
12:33 pm - 2:03 pm
SFO
-
ONT
1h 30mnonstop
$90Frontier
Thu, Aug 27 - Mon, Aug 31
Frontier Logo
7:07 pm - 8:40 pm
LAX
-
SFO
1h 33mnonstop
Frontier Logo
8:23 pm - 9:54 pm
SFO
-
LAX
1h 31mnonstop
$91Frontier
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 $135 (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 $220 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 $76 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 $76 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 $183. On the other hand, the most expensive day to fly is Sunday, where prices are $226 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 $195 on average.

Good to know

Low season

January

Cheapest flight

$28

Average price round-trip

$5,314

Good deal round-trip

$4,517
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 15% 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

  • 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.

  • 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

  • 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
Fair2,771 verified ratings
5.4Comfort
4.5Food
4.3Entertainment
5.9Boarding
6.6Crew
Traveler rating:
Sort by:
I
2.0 Poor
During the flight I suddenly felt very sick, and no one from the crew even tried to help me or check on my condition. They seemed completely indifferent and showed no concern for my well-being. I was very disappointed by the lack of care and compassion. I hope the airline improves its customer service and trains its crew to respond better when passengers need assistance.
C
2.0 Poor
Repeated delays due to poor aircraft maintenance.
M
8.0 Very good
I liked Everything
A
2.0 Poor
Tiny seats, no entertainment, no amenities, delays, they charge for carry on and their allowed personal item is smaller than in other airlines.
A
2.0 Poor
The seats are tiny and they don’t recline. The planes are dirty and very small. You have to pay for carry on and even the personal item that you’re allowed is smaller than with other airlines. Flights are usually delayed and there’s no screens or any amenities or entertainment.
A
8.0 Very good
Flight was delayed but it was very smooth. Crew was very nice. Seats are uncomfortable but ok.
A
2.0 Poor
Flight was delayed and then my second leg was completely canceled. Had to get a refund
D
10.0 Wonderful
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 .
A
2.0 Poor
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.
A
10.0 Wonderful
All was great
Read more about Frontier

Everything you need to know for your flight to San Francisco