Cheap Flights from Seattle to Ontario
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Flight deals from Seattle to Ontario
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Round-trip
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One way
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Cheapest nonstop
SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Wed, Jun 4 | Frontier Airlines
SIN 10:032h 46mDirectSEA 12:49Ontario - Seattle | Sat, Jun 7 | Frontier AirlinesNZD 140 NZD 19127% OFF27% OFFNZD 191 NZD 140 -
SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Sat, Jun 7 | Frontier Airlines
SIN 10:032h 46mDirectSEA 12:49Ontario - Seattle | Mon, Jun 9 | Frontier AirlinesNZD 149 NZD 19122% OFF22% OFFNZD 191 NZD 149
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SEA 15:102h 42mDirectONT 17:52Seattle - Ontario | Tue, Jun 10 | Frontier Airlines
SIN 10:062h 46mDirectSEA 12:52Ontario - Seattle | Wed, Jun 11 | Frontier AirlinesNZD 155 NZD 19119% OFF19% OFFNZD 191 NZD 155
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Thu, Jun 5 | Frontier Airlines
SIN 08:382h 55mDirectSEA 11:33Ontario - Seattle | Mon, Jun 9 | Frontier AirlinesNZD 15619% OFFNZD 191 NZD 156
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Fri, Jun 6 | Frontier Airlines
SIN 11:332h 47mDirectSEA 14:20Ontario - Seattle | Tue, Jun 10 | Frontier AirlinesNZD 16116% OFFNZD 191 NZD 161
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Sun, Jun 8 | Frontier Airlines
SIN 10:062h 46mDirectSEA 12:52Ontario - Seattle | Wed, Jun 11 | Frontier AirlinesNZD 16315% OFFNZD 191 NZD 163
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Wed, Jun 11 | Frontier Airlines
SIN 10:032h 46mDirectSEA 12:49Ontario - Seattle | Sat, Jun 14 | Frontier AirlinesNZD 16713% OFFNZD 191 NZD 167
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Thu, Jun 12 | Frontier Airlines
SIN 10:032h 46mDirectSEA 12:49Ontario - Seattle | Fri, Jun 13 | Frontier AirlinesNZD 16812% OFFNZD 191 NZD 168
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Mon, Jun 9 | Frontier Airlines
SIN 10:032h 46mDirectSEA 12:49Ontario - Seattle | Thu, Jun 12 | Frontier AirlinesNZD 1749% OFFNZD 191 NZD 174
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Fri, Jun 13 | Frontier Airlines
SIN 10:032h 46mDirectSEA 12:49Ontario - Seattle | Tue, Jun 17 | Frontier AirlinesNZD 1787% OFFNZD 191 NZD 178
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SEA 13:0017h 25m1 stopsONT Invalid DateSeattle - Ontario | Fri, Jun 6 | Normal Airline
ONT 15:006hDirectSEA 16:00Ontario - Seattle | Sun, Jun 8 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Sat, Jun 14 | Frontier AirlinesNZD 67 NZD 9832% OFF32% OFFNZD 98 NZD 67
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Thu, Jun 5 | Frontier AirlinesNZD 70 NZD 9828% OFF28% OFFNZD 98 NZD 70
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Wed, Jun 4 | Frontier AirlinesNZD 73 NZD 9826% OFF26% OFFNZD 98 NZD 73
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SEA 15:102h 42mDirectONT 17:52Seattle - Ontario | Tue, Jun 10 | Frontier AirlinesNZD 7623% OFFNZD 98 NZD 76
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Wed, Jun 11 | Frontier AirlinesNZD 7722% OFFNZD 98 NZD 77
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Sat, Jun 7 | Frontier AirlinesNZD 7721% OFFNZD 98 NZD 77
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Thu, Jun 12 | Frontier AirlinesNZD 8414% OFFNZD 98 NZD 84
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Tue, Jun 17 | Frontier AirlinesNZD 8613% OFFNZD 98 NZD 86
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SEA 13:422h 54mDirectONT 16:36Seattle - Ontario | Tue, Jul 15 | Frontier AirlinesNZD 8612% OFFNZD 98 NZD 86
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SEA 13:502h 40mDirectONT 16:30Seattle - Ontario | Fri, Jun 6 | Frontier AirlinesNZD 927% OFFNZD 98 NZD 92
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SEA 13:0017h 25m1 stopsONT Invalid DateSeattle - Ontario | Fri, Jun 6 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
Flight Information from Seattle to Ontario
| Cheapest one-way flight price | NZD 66 |
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| Cheapest round-trip ticket price | NZD 139 |
| Off-season for travel | April |
| Peak season for travel | September |
| Flight distance | 1,538.43 km |
| Popular airline | Alaska Airlines |
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FAQ
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When are flight tickets from Seattle (SEA) to Ontario (ONT) the cheapest?
Airlines adjust prices for flights from Seattle to Ontario based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much do flights from Seattle (SEA) to Ontario (ONT) cost?
According to Trip.com's data, the lowest price is around NZD 309.
How to find a cheap flight from Seattle to Ontario
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Seattle to Ontario. Book your flights at the right time and save more.
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