Cheap flights from Seattle to Ontario from £45

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Direct
Tue, Jul 29
Seattle SEAOntario ONT

£45
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Direct
Tue, Jul 29
Seattle SEAOntario ONT

£45
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Direct
Sat, Aug 2
Seattle SEAOntario ONT

£68
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Direct
Fri, Aug 1
Seattle SEAOntario ONT

£71
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Direct
Fri, Aug 1
Seattle SEAOntario ONT

£71
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Direct
Wed, Jul 30
Seattle SEAOntario ONT

£78
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Prices updated:

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Direct
Sat, Aug 2 – Tue, Aug 5
Seattle SEAOntario ONT

£111
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Direct
Sat, Aug 2 – Tue, Aug 5
Seattle SEAOntario ONT

£111
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Direct
Tue, Jul 29 – Sat, Aug 2
Seattle SEAOntario ONT

£114
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Direct
Tue, Jul 29 – Sat, Aug 2
Seattle SEAOntario ONT

£114
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Direct
Tue, Jul 29 – Sat, Aug 2
Seattle SEAOntario ONT

£114
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Direct
Tue, Jul 29 – Sat, Aug 2
Seattle SEAOntario ONT

£114
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Prices updated:

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Key info about flying to Ontario

Depart from
Seattle–Tacoma International
Arrive to
Ontario International
Average flights per week
87
Flight distance
1542 km
Worth visiting
Griffith Observatory

Weekly direct flights

Discover the top airlines offering direct flights from Seattle to Ontario in the next month. You’ll find the number of daily direct flights per airline in the chart.

AirlineMon 30.06Tue 01.07Wed 02.07Thu 03.07Fri 04.07Sat 05.07Sun 06.07
---------2---33
---------111---
---------4331
Weekly flights: 22 totalDaily flights: 3.14 averageMost flights: Thursday 4 flights
AirlineMon 07.07Tue 08.07Wed 09.07Thu 10.07Fri 11.07Sat 12.07Sun 13.07
5355545
1111111
---3---532---
Weekly flights: 52 totalDaily flights: 7.43 averageMost flights: Monday 5 flights
AirlineMon 14.07Tue 15.07Wed 16.07Thu 17.07Fri 18.07Sat 19.07Sun 20.07
5455544
1111111
---1------------1
Weekly flights: 41 totalDaily flights: 5.86 averageMost flights: Monday 5 flights
AirlineMon 21.07Tue 22.07Wed 23.07Thu 24.07Fri 25.07Sat 26.07Sun 27.07
5555545
1111111
---------------------
Weekly flights: 41 totalDaily flights: 5.86 averageMost flights: Monday 5 flights

Check-in for a flight from Seattle to Ontario

NameCarrier codeIATA CodePassport needed during booking
Alaska AirlinesASAASNo
Frontier AirlinesFFTF9No
Hawaiian AirlinesHALHANo
United AirlinesUALUANo

Weather in Ontario

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January18°C7°C
February18°C7°C
March19°C8°C
April23°C10°C
May25°C12°C
June29°C16°C
July33°C19°C
August33°C20°C
September32°C18°C
October27°C15°C
November22°C10°C
December17°C7°C
Hottest Month
33°C
August
Coldest month
7°C
February
Sunny days
340
days per year

14 day forecast

Friday
4 Jul
32°C18°C
11 Jul
34°C21°C
Saturday
5 Jul
34°C19°C
12 Jul
32°C19°C
Sunday
6 Jul
32°C19°C
13 Jul
33°C19°C
Monday
7 Jul
31°C19°C
14 Jul
33°C19°C
Tuesday
8 Jul
35°C19°C
15 Jul
33°C19°C
Wednesday
9 Jul
36°C21°C
16 Jul
32°C20°C
Thursday
10 Jul
35°C22°C
17 Jul
31°C20°C

Ontario travel tips

Try the best spaghetti in Ontario at Vince's Spaghetti
Check out wines around Ontario
Experience camping in Ontario's landscapes
Travelers usually depart from Seattle–Tacoma International, Boeing Field, or Kenmore Air Harbor Seaplane Base when they travel from Seattle to Ontario. The distance between Seattle and Ontario is 1542 km. The most popular airlines for this route are Alaska Airlines, Frontier Airlines, Hawaiian Airlines, and United Airlines. Seattle and Ontario have 87 direct flights per week.

Frequently asked questions

How long does it take to travel from Seattle to Ontario?
What is the flight distance between Seattle and Ontario?
What airlines offer nonstop (direct) flights between Seattle and Ontario?
What are the most popular routes to and from Seattle?
What are the most popular routes to and from Ontario?
Which airports are there in Seattle?
What airports are near Seattle?
What airports are near Ontario?
Which airlines fly between Seattle and Ontario?
When’s the best time to travel between Seattle and Ontario?
What flights operate between Seattle and Ontario?
How many airports are there near Seattle?
How many airports are there near Ontario?
What time do nonstop (direct) flights between Seattle and Ontario depart?
What time do nonstop (direct) flights between Seattle and Ontario arrive?
What time do flights between Seattle and Ontario depart?
What time do flights between Seattle and Ontario arrive?

Explore alternative trips

Flights from Seattle

Flights to Ontario

Popular routes

The nearest countries with flights to Ontario

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Other destination countries from Seattle

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