Find cheap Frontier flights to San Francisco
RDU — SFO
Aug 26 — Sep 21
Round-trip
1 adult, Economy
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Cheapest Frontier flights from USA to San FranciscoExplore the most affordable Frontier flight options available from USA to San Francisco. Find the lowest fares with prices last updated on July 27, 2026.
Explore the most affordable Frontier flight options available from USA to San Francisco. Find the lowest fares with prices last updated on July 27, 2026.
This Frontier deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:48 am
ONT
- SFO
Nonstop1h 27m
Frontier
Tue 8/2512:33 pm
SFO
- ONT
Nonstop1h 30m
Frontier
Deal found 7/27![Frontier logo]()
$69
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:58 am
ONT
- SFO
Nonstop1h 27m
Frontier
Mon 8/179:33 am
SFO
- ONT
Nonstop1h 29m
Frontier
Deal found 7/26![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:13 pm
ONT
- SFO
Nonstop1h 27m
Frontier
Sat 8/299:33 am
SFO
- ONT
Nonstop1h 29m
Frontier
Deal found 7/25![Frontier logo]()
$73
Best Frontier flights from USA to San FranciscoDiscover carefully curated Frontier flight deals from USA to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
Discover carefully curated Frontier flight deals from USA to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
This Justfly.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:07 pm
LAX
- SFO
Nonstop1h 33m
Frontier
Tue 8/258:23 pm
SFO
- LAX
Nonstop1h 31m
Frontier
Deal found 7/24![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:47 am
LAX
- SFO
1 stop11h 58m
Frontier
Mon 10/127:30 pm
SFO
- LAX
Nonstop1h 31m
Frontier
Deal found 7/22![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:48 am
ONT
- SFO
Nonstop1h 27m
Frontier
Fri 8/219:33 am
SFO
- ONT
Nonstop1h 29m
Frontier
Deal found 7/25![Frontier logo]()
$96
Direct Frontier flights from USA to San FranciscoExplore non-stop Frontier flight options from USA to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 27, 2026.
Explore non-stop Frontier flight options from USA to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 27, 2026.
This Frontier deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2812:07 pm
ONT
- SFO
Nonstop1h 36m
Frontier
Mon 10/2612:31 pm
SFO
- ONT
Nonstop1h 29m
Frontier
Deal found 7/27![Frontier logo]()
$67
This Frontier deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:48 am
ONT
- SFO
Nonstop1h 27m
Frontier
Tue 8/2512:33 pm
SFO
- ONT
Nonstop1h 30m
Frontier
Deal found 7/27![Frontier logo]()
$69
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:58 am
ONT
- SFO
Nonstop1h 27m
Frontier
Mon 8/179:33 am
SFO
- ONT
Nonstop1h 29m
Frontier
Deal found 7/26![Frontier logo]()
$71
Last-minute Frontier flights from USA to San FranciscoDiscover last-minute Frontier flight deals from USA to San Francisco. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute Frontier flight deals from USA to San Francisco. Data last updated July 27, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:48 am
ONT
- SFO
Nonstop1h 27m
Frontier
Tue 8/2512:33 pm
SFO
- ONT
Nonstop1h 30m
Frontier
Deal found 7/27![Frontier logo]()
$69
This Frontier deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:58 am
ONT
- SFO
Nonstop1h 27m
Frontier
Mon 8/179:33 am
SFO
- ONT
Nonstop1h 29m
Frontier
Deal found 7/26![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:13 pm
ONT
- SFO
Nonstop1h 27m
Frontier
Sat 8/299:33 am
SFO
- ONT
Nonstop1h 29m
Frontier
Deal found 7/25![Frontier logo]()
$73
One-way Frontier flights to San FranciscoSearch for one-way Frontier flight options to San Francisco. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
Search for one-way Frontier flight options to San Francisco. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This Frontier deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:48 am
ONT
- SFO
Nonstop1h 27m
Frontier
Deal found 7/23![Frontier logo]()
$28
This Frontier deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:48 am
ONT
- SFO
Nonstop1h 27m
Frontier
Deal found 7/24![Frontier logo]()
$29
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:38 am
ONT
- SFO
Nonstop1h 34m
Frontier
Deal found 7/25![Frontier logo]()
$30
Flights to San Francisco with Frontier at a glance
Find detailed information about Frontier flights from USA to San Francisco. Explore the options provided by Frontier to plan your journey from USA to San Francisco. Data last updated July 27, 2026.
Cheapflights Insights
Find cheap Frontier flights to San Francisco
US0-SFO
ONT-SFO
LAX-SFO
How long is the flight to San Francisco with Frontier?
On average, Frontier flights from the United States to San Francisco take 4 hours 7 minutes. Flights to San Francisco from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
Frontier weekly flight availability to San Francisco
The most flights to San Francisco operated by Frontier are scheduled on a Monday (13 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).
When is the best time to book a flight to San Francisco with Frontier?
The best time to book a flight to San Francisco with Frontier is 67 days before departure. On average, fares are higher if you book on the same day as departure.
When is the cheapest time to fly to San Francisco with Frontier?
Users looking for the cheapest Frontier fares to San Francisco should consider flying on Friday mornings, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday at noon, when prices are usually at their highest.
FAQs about flights to San Francisco with Frontier
Reviews of Frontier
See what Cheapflights users have to say about their Frontier experience.
Overview
Reviews
Frontier
2,755 reviews
Overview
Boarding
5.9
Comfort
5.4
Crew
6.6
Food
4.5
Entertainment
4.3
Recent reviews
10.0
|Jul 2026Better Food and there was no entertainment . You guys could provide head phones and wifi for the passengers
2.0
|Jul 2026Flight delayed 3 hours
6.0
|Jun 2026Nothing. Needs better seat. Need atleast water. Need wifi
4.0
|Jun 2026The flight was delayed about 3hours
2.0
|Jun 2026I paid extra for seating upfront but was very cramped and had to wait for other passengers to unboard even though I paid for seating upfront front to unboard first. Reason being they were probably not going to make their connecting flights because we had to wait an hour and a half for an open gate. I had to wait on the tarmac for as long as the flight itself took. It was a horrible experience and not only should I receive a refund for my upgrade, but I should receive a refund for the entire flight. I plan on sending a formal complaint as well as letting friends and family know that frontier is a horrible choice. It is by far a better option to pay a bit more and use a different airline. My opinion may be changed if something is done to earn my business once more. Otherwise I have nothing positive to say about my experience.
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