Frontier's UpFront Plus seats offer a guaranteed empty middle seat for added comfort.
Frontier's Zone 1 boarding is available with carry-on purchase or special fare bundles.
Most accurate provider | FlightHub 3 stars |
---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $96 (Cheapflightsfares) |
One-way from | $51 (Frontier) |
Popular in | December |
Cheapest in | September |
Average price | $233 |
Good round-trip deal | $155 or less |
Good one-way deal | $91 or less |
Fly from
Fly to
Route
Depart
Return
Price
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Mon 6/2
1:50 pm-4:30 pm
Nonstop2h 40m
Ontario
Wed 6/4
10:03 am-12:49 pm
Nonstop2h 46m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Thu 5/1
6:50 pm-9:25 pm
Nonstop2h 35m
Ontario
Wed 5/7
6:00 am-8:46 am
Nonstop2h 46m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Tue 4/29
7:59 pm-10:43 pm
Nonstop2h 44m
Ontario
Tue 5/6
5:45 am-8:42 am
Nonstop2h 57m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Fri 5/2
2:56 pm-5:30 pm
Nonstop2h 34m
Ontario
Fri 5/9
6:24 pm-9:00 pm
Nonstop2h 36m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Sat 5/17
4:25 pm-9:10 pm
1 stop4h 45m
Ontario
Mon 5/19
6:25 pm-10:45 pm
1 stop4h 20m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Sat 5/3
8:13 am-10:51 am
Nonstop2h 38m
Ontario
Sun 5/4
6:00 am-8:46 am
Nonstop2h 46m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Thu 6/12
5:10 am-12:14 pm
1 stop7h 04m
Ontario
Tue 6/17
1:36 pm-9:11 pm
1 stop7h 35m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Mon 4/14
12:46 pm-3:25 pm
Nonstop2h 39m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Sat 5/3
12:59 pm-3:32 pm
Nonstop2h 33m
SeattleOntario
SEA - ONT
SEAONT
Seattle/Tacoma Intl
Sat 4/26
6:42 am-11:59 am
1 stop5h 17m
Provider | Price Accuracy | Trust Score* |
---|---|---|
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*2 stars | |
Price Accuracy3 stars | Trust Score*2 stars | |
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy- | Trust Score*3 stars | |
Price Accuracy- | Trust Score*3 stars |
The best time to book flights from Seattle to Ontario is 72 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, August is the cheapest month in which you can book a flight from Seattle to Ontario (average of $246). Flying from Seattle to Ontario in March is currently the most expensive (average of $328). 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.
A simple way to save on the total cost of your ticket is to fly from Seattle to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 32% on your trip compared to booking a flight in the morning.
Travelers seeking maximum savings on their Seattle to Ontario flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from SEA to ONT are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).
In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.
If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Anonymous,Aug 2024
SEA - LAS
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Anonymous,Aug 2024
SEA - LAS
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Anonymous,Aug 2024
SEA - LAS
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Anonymous,Aug 2024
SEA - LAS
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Anonymous,Aug 2024
SEA - LAS
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Anonymous,Aug 2024
SEA - LAS
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$40 | Average$100 | FlexibilityNo cancel fee | On-time65% | |
Cheapest$56 | Average$133 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$95 | Average$248 | FlexibilityNo cancel fee | On-time85% | |
Cheapest$117 | Average$260 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$136 | Average$271 | FlexibilityNo cancel fee | On-time75% | |
Cheapest$196 | Average$316 | FlexibilityNo cancel fee | On-time63% |