Nonstop flights from Ontario to San Francisco ONT → SFO
Ontario International Airport (ONT) → San Francisco International Airport (SFO)
The cheapest nonstop return found recently is $130 with Frontier Airlines, 15 Nov – 18 Nov, found yesterday.
Nonstop return
The cheapest nonstop return fare on each of 9 departure dates is usually $130 to $295.
Cheapest nonstop return
$130
15 Nov – 18 Nov · Frontier Airlines
Ontario International Airport (ONT) → San Francisco International Airport (SFO)
Leaves 12:01 p.m. · Return leaves 9:27 p.m. · 3 h 2 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Airlines flying it nonstop on the return fares we hold: Frontier Airlines (6 departure dates), United Airlines (4 departure dates).
We hold too few return trips with both a nonstop fare and a fare with stops on the same dates to compare the two.
Every nonstop date we hold
Nonstop fares on 9 of the 14 departure dates we hold for this route.
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 22 Oct – 24 Oct | $322 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 23 Oct – 28 Oct | $295 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 28 Oct – 4 Nov | $261 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 30 Oct – 4 Nov | $169 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 31 Oct – 2 Nov | $259 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 15 Nov – 18 Nov | $130 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 16 Nov – 19 Nov | $87 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 5 Dec – 9 Dec | $29 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 20 Mar 2027 – 30 Mar 2027 | $354 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
Nonstop one-way
The cheapest nonstop one-way fare on each of 23 departure dates is usually $51 to $126.
Cheapest nonstop one-way
$21
5 Dec · Frontier Airlines
Ontario International Airport (ONT) → San Francisco International Airport (SFO)
Leaves 7:26 p.m. · 1 h 35 min trip
nonstop
found today
Airlines flying it nonstop on the one-way fares we hold: Frontier Airlines (15 departure dates), United Airlines (8 departure dates).
We hold too few one-way trips with both a nonstop fare and a fare with stops on the same dates to compare the two.
Every nonstop date we hold
Nonstop fares on 23 of the 24 departure dates we hold for this route.
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 26 Oct | $107 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 5 days ago | Open this trip |
| 30 Oct | $114 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found today | Open this trip |
| 3 Nov | $58 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 6 days ago | Open this trip |
| 4 Nov | $59 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 6 days ago | Open this trip |
| 5 Nov | $22 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 4 days ago | Open this trip |
| 6 Nov | $46 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 3 days ago | Open this trip |
| 7 Nov | $59 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 6 days ago | Open this trip |
| 8 Nov | $95 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 3 days ago | Open this trip |
| 12 Nov | $51 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found today | Open this trip |
| 13 Nov | $51 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found yesterday | Open this trip |
| 14 Nov | $63 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 6 days ago | Open this trip |
| 25 Nov | $138 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 4 days ago | Open this trip |
| 1 Dec | $54 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 5 days ago | Open this trip |
| 5 Dec | $21 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found today | Open this trip |
| 21 Dec | $42 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 2 days ago | Open this trip |
| 23 Dec | $54 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 2 days ago | Open this trip |
| 24 Dec | $28 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 6 days ago | Open this trip |
| 27 Dec | $200 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 2 days ago | Open this trip |
| 28 Dec | $138 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found yesterday | Open this trip |
| 19 Feb 2027 | $62 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 6 days ago | Open this trip |
| 13 Mar 2027 | $205 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 4 days ago | Open this trip |
| 25 Mar 2027 | $207 | United Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 3 days ago | Open this trip |
| 28 Mar 2027 | $157 | Frontier Airlines | Ontario International Airport (ONT) → San Francisco International Airport (SFO) | nonstop | found 3 days ago | Open this trip |
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work