
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $53 (Frontier) |
One-way from | $34 (CheapOair) |
Popular in | December |
Cheapest in | January |
Average price | $383 |
Good round-trip deal | $135 or less |
Good one-way deal | $43 or less |
Fly from
Fly to
Route
Depart
Return
Price
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Fri 3/6
5:00 pm-12:09 am
1 stop7h 09m
Seattle/Tacoma Intl
Mon 3/9
2:30 pm-5:12 pm
Nonstop2h 42m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Mon 12/22
5:10 pm-12:20 am
1 stop7h 10m
Seattle/Tacoma Intl
Sat 1/3
8:15 am-11:02 am
Nonstop2h 47m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Sat 1/24
3:30 pm-6:35 pm
Nonstop3h 05m
Seattle/Tacoma Intl
Mon 1/26
7:00 pm-11:58 pm
1 stop4h 58m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Thu 1/22
3:30 pm-6:35 pm
Nonstop3h 05m
Seattle/Tacoma Intl
Thu 1/29
7:00 pm-11:58 pm
1 stop4h 58m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Tue 12/16
6:00 am-7:24 am
Nonstop1h 24m
San Francisco
Tue 12/16
10:55 am-12:17 pm
Nonstop1h 22m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Thu 1/8
1:10 pm-6:29 pm
1 stop5h 19m
Seattle/Tacoma Intl
Mon 1/12
6:05 pm-10:38 pm
1 stop4h 33m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Sat 1/10
6:00 am-12:33 pm
1 stop6h 33m
Seattle/Tacoma Intl
Sun 1/11
6:05 pm-10:38 pm
1 stop4h 33m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Wed 1/21
1:10 pm-6:29 pm
1 stop5h 19m
Seattle/Tacoma Intl
Thu 1/29
7:00 pm-11:58 pm
1 stop4h 58m
OntarioSan Francisco
ONT - SFO
ONTSFO
Ontario
Wed 12/10
1:50 pm-3:14 pm
Nonstop1h 24m
San Francisco
Thu 12/11
9:28 pm-10:49 pm
Nonstop1h 21m
OntarioSeattle
ONT - SEA
ONTSEA
Ontario
Sat 1/10
1:40 pm-8:20 pm
1 stop6h 40m
Seattle/Tacoma Intl
Mon 1/12
11:20 am-4:25 pm
1 stop5h 05m
Currently, December is the cheapest month in which you can book a flight from Ontario to North America (average of $17). Flying from Ontario to North America in July is currently the most expensive (average of $49). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from Ontario to North America in the afternoon. Doing so could potentially save you 32% on the flight price compared to flying in the morning, which is usually more expensive.
Travelers seeking maximum savings on their Ontario to North America flight should consider departing on Sunday at noon when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Food
Boarding
Comfort
Crew
Entertainment
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Boarding
Comfort
Crew
Entertainment
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Boarding
Comfort
Crew
Entertainment
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Boarding
Comfort
Crew
Entertainment
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Boarding
Comfort
Crew
Entertainment
Overall
Reviews
Walter,Aug 2025
OAK - SAN
Food
Boarding
Comfort
Crew
Entertainment
Overall
Reviews
Walter,Aug 2025
OAK - SAN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$24 | Average$161 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$36 | Average$201 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$58 | Average$402 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$67 | Average$319 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$97 | Average$393 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$178 | Average$407 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$228 | Average$248 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$237 | Average$330 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$242 | Average$464 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$273 | Average$384 | FlexibilityNo cancel fee | On-time79% |