Cheap Flights from Ontario to Seattle
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Flight deals from Ontario to Seattle
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
ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Mon, May 12 | Frontier Airlines
SEA 16:202h 45mNonstopSIN 19:05Seattle - Ontario | Sat, May 17 | Frontier AirlinesNZD 113 NZD 19743% OFF43% OFFNZD 197 NZD 113 -
ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Thu, May 8 | Frontier Airlines
SEA 16:202h 45mNonstopSIN 19:05Seattle - Ontario | Sat, May 10 | Frontier AirlinesNZD 114 NZD 19742% OFF42% OFFNZD 197 NZD 114
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ONT 16:292h 54mNonstopSEA 19:23Ontario - Seattle | Mon, Apr 28 | Frontier Airlines
SEA 10:062h 45mNonstopSIN 12:51Seattle - Ontario | Mon, May 5 | Frontier AirlinesNZD 128 NZD 19735% OFF35% OFFNZD 197 NZD 128
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ONT 17:302h 53mNonstopSEA 20:23Ontario - Seattle | Tue, Apr 15 | Delta Air Lines
SEA 15:122h 48mNonstopSIN 18:00Seattle - Ontario | Sat, Apr 19 | Frontier AirlinesNZD 13034% OFFNZD 197 NZD 130 -
ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Thu, May 1 | Frontier Airlines
SEA 18:502h 35mNonstopSIN 21:25Seattle - Ontario | Mon, May 5 | Frontier AirlinesNZD 13233% OFFNZD 197 NZD 132
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ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Mon, May 5 | Frontier Airlines
SEA 18:502h 35mNonstopSIN 21:25Seattle - Ontario | Mon, May 12 | Frontier AirlinesNZD 13233% OFFNZD 197 NZD 132
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ONT 06:002h 50mNonstopSEA 08:50Ontario - Seattle | Tue, Apr 15 | Hawaiian Airlines
SEA 15:122h 48mNonstopSIN 18:00Seattle - Ontario | Sat, Apr 19 | Frontier AirlinesNZD 13532% OFFNZD 197 NZD 135 -
ONT 10:033hNonstopSEA 13:03Ontario - Seattle | Wed, May 28 | Frontier Airlines
SEA 10:492h 45mNonstopSIN 13:34Seattle - Ontario | Sat, May 31 | Frontier AirlinesNZD 13731% OFFNZD 197 NZD 137
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ONT 06:002h 50mNonstopSEA 08:50Ontario - Seattle | Tue, Apr 15 | Alaska Airlines
SEA 15:122h 48mNonstopSIN 18:00Seattle - Ontario | Sat, Apr 19 | Frontier AirlinesNZD 13830% OFFNZD 197 NZD 138 -
ONT 12:1612h 28m1 stopsSEA 00:44Ontario - Seattle | Wed, May 7 | Frontier Airlines
SEA 16:202h 45mNonstopSIN 19:05Seattle - Ontario | Tue, May 13 | Frontier AirlinesNZD 14028% OFFNZD 197 NZD 140
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ONT 13:0017h 25m1 stopsSEA Invalid DateOntario - Seattle | Wed, Apr 16 | Normal Airline
SEA 15:006hNonstopONT 16:00Seattle - Ontario | Fri, Apr 18 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Thu, May 8 | Frontier AirlinesNZD 50 NZD 10352% OFF52% OFFNZD 103 NZD 50
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ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Mon, May 5 | Frontier AirlinesNZD 68 NZD 10334% OFF34% OFFNZD 103 NZD 68
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ONT 10:053hNonstopSEA 13:05Ontario - Seattle | Thu, May 22 | Frontier AirlinesNZD 68 NZD 10333% OFF33% OFFNZD 103 NZD 68
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ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Mon, May 12 | Frontier AirlinesNZD 6933% OFFNZD 103 NZD 69
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ONT 16:292h 54mNonstopSEA 19:23Ontario - Seattle | Mon, Apr 28 | Frontier AirlinesNZD 6933% OFFNZD 103 NZD 69
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ONT 10:032h 46mNonstopSEA 12:49Ontario - Seattle | Wed, Jun 4 | Frontier AirlinesNZD 7032% OFFNZD 103 NZD 70
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ONT 16:292h 54mNonstopSEA 19:23Ontario - Seattle | Fri, Apr 25 | Frontier AirlinesNZD 7032% OFFNZD 103 NZD 70
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ONT 10:032h 46mNonstopSEA 12:49Ontario - Seattle | Mon, Jun 2 | Frontier AirlinesNZD 7032% OFFNZD 103 NZD 70
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ONT 10:122h 54mNonstopSEA 13:06Ontario - Seattle | Mon, Apr 21 | Frontier AirlinesNZD 7032% OFFNZD 103 NZD 70
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ONT 16:293h 3mNonstopSEA 19:32Ontario - Seattle | Thu, May 15 | Frontier AirlinesNZD 7328% OFFNZD 103 NZD 73
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ONT 13:0017h 25m1 stopsSEA Invalid DateOntario - Seattle | Wed, Apr 16 | 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.
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FAQ
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When are flight tickets from Ontario (ONT) to Seattle (SEA) the cheapest?
Airlines adjust prices for flights from Ontario to Seattle 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 Ontario (ONT) to Seattle (SEA) cost?
According to Trip.com's data, the lowest price is around NZD 310.
How to find a cheap flight from Ontario to Seattle
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 Ontario to Seattle. Book your flights at the right time and save more.
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Flight Information from Ontario to Seattle
| Cheapest one-way flight price | NZD 49 |
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| Cheapest round-trip ticket price | NZD 113 |
| Off-season for travel | March |
| Peak season for travel | February |
| Flight distance | 12,362.98 km |
| Popular airline | Alaska Airlines |