Cheap flights from Ontario to Seattle

Round-trip
Economy
Los Angeles (LAX)
Seattle (SEA)
Tue 8/4
Tue 8/11
Any month
Compare vs. momondo |

Flight information for Ontario to Seattle

Find info about flight duration, direct flights, and airports for your flight from Ontario to Seattle
Best Price Found $138 The best flight deal from Ontario to Seattle found on momondo in the last 72 hours is $138
Fastest flight time 2h 40m The fastest flight from Ontario to Seattle takes 2h 40m.
Direct flights None There are no direct flights from Ontario to Seattle. Popular non-direct route for this connection is Ontario - Seattle/Tacoma Intl.
Airports in Seattle 3 airports There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

How to get the cheapest flight ticket from Ontario to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
April
The cheapest time of year to fly to Seattle from Ontario is April. Most expensive is July
What is the cheapest day to fly to Seattle?
Wednesday
The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday
When is the cheapest time to fly to Seattle?
at noon
Ontario to Seattle flights are approximately 23% more expensive in the morning than at noon
What is the cheapest airline that flies to Seattle?
Frontier
Frontier, JetBlue, and Major Airline are the most popular carriers operating from Ontario to Seattle
What is the cheapest route?
Ontario - Seattle/Tacoma Intl
Fly from Ontario to Seattle/Tacoma Intl for the best Ontario - Seattle flight prices
ONT
Ontario
SEA
Seattle/Tacoma Intl
When is the cheapest time to book a flight to Seattle?
54 days before
The cheapest time to buy a flight from Ontario to Seattle is approximately 54 days to departure
60
Days before departure
0

Easily compare round-trip flights from Ontario to Seattle

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ontario to Seattle by changing tabs
Cheapest
Best
Quickest
Multiple Airlines
Jul 8
ONT
Ontario
2h 49m
SEA
Seattle/Tacoma Intl
Jul 11
SEA
Seattle/Tacoma Intl
5h 05m
1 stop
ONT
Ontario
Delta
Jul 8
ONT
Ontario
5h 20m
1 stop
SEA
Seattle/Tacoma Intl
Jul 9
SEA
Seattle/Tacoma Intl
5h 05m
1 stop
ONT
Ontario
Multiple Airlines
Jul 4
ONT
Ontario
5h 20m
1 stop
SEA
Seattle/Tacoma Intl
Jul 11
SEA
Seattle/Tacoma Intl
2h 32m
ONT
Ontario

Find the cheapest one-way flights from Ontario to Seattle

If you're looking for one-way flights from Ontario to Seattle, view some of our deals below provided by Delta
Cheapest
Best
Quickest
Delta
Jul 11
ONT
Ontario
5h 20m
1 stop
SEA
Seattle/Tacoma Intl
Multiple Airlines
Aug 28
ONT
Ontario
14h 57m
1 stop
SEA
Seattle/Tacoma Intl
Delta
Jul 10
ONT
Ontario
5h 20m
1 stop
SEA
Seattle/Tacoma Intl

Alternative routes for Ontario to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Los Angeles to Seattle Flights
Fastest flight time
2h 26m
Cheapest price
$73
Burbank to Seattle Flights
Fastest flight time
2h 41m
Cheapest price
$75
Los Angeles to Bellingham Flights
Fastest flight time
2h 37m
Cheapest price
$82
Oakland, California to Seattle Flights
Fastest flight time
2h 05m
Cheapest price
$89
Oakland, California to Bellingham Flights
Fastest flight time
2h 01m
Cheapest price
$104
Long Beach to Seattle Flights
Fastest flight time
2h 41m
Cheapest price
$127
Los Angeles to Spokane Flights
Fastest flight time
2h 25m
Cheapest price
$148
Fresno to Seattle Flights
Fastest flight time
2h 11m
Cheapest price
$154
Fresno to Spokane Flights
Fastest flight time
4h 44m
Cheapest price
$157
Ontario to Spokane Flights
Fastest flight time
4h 21m
Cheapest price
$165
Long Beach to Spokane Flights
Fastest flight time
4h 41m
Cheapest price
$169
Burbank to Spokane Flights
Fastest flight time
4h 06m
Cheapest price
$176
Palm Springs to Seattle Flights
Fastest flight time
2h 46m
Cheapest price
$179
Palm Springs to Spokane Flights
Fastest flight time
5h 48m
Cheapest price
$182
Oakland, California to Spokane Flights
Fastest flight time
5h 14m
Cheapest price
$258
Los Angeles to Walla Walla Flights
Fastest flight time
5h 40m
Cheapest price
$354
View more

Flights from Ontario to:

  • Round-trip
  • One-way
  • Multi-city
  • Economy
  • Premium Economy
  • Business
  • First
  • Multiple
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First