Take off on cheap flights from Seattle to Ontario, your adventure starts now!

Find cheap airline tickets from Seattle to Ontario by date

  • any
  • May 2018
  • June 2018
  • July 2018
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  • September 2018
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  • November 2018
  • December 2018
  • January 2019
  • February 2019
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  • April 2019
  • any
  • May 2018
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  • price
  • month of departure
  • month of return
$190
outward: Jun 3, 2018
4:40a SEA » 7:04a ONT
Alaska Airlines direct (2h24m)
inbound: Jun 13, 2018
3:09a ONT » 5:40a SEA
Alaska Airlines direct (2h31m)
$191
outward: May 31, 2018
12:30a SEA » 7:10a LAX
Spirit Airlines 1 stop (6h40m)
inbound: Jun 2, 2018
3:00p LAX » 11:19p SEA
Spirit Airlines 1 stop (8h19m)
$201
outward: Jun 1, 2018
12:30a SEA » 7:10a LAX
Spirit Airlines 1 stop (6h40m)
inbound: Jun 4, 2018
5:05a ONT » 10:00a SEA
Southwest Airlines 1 stop (4h55m)
$222
outward: May 31, 2018
3:50p SEA » 6:14p ONT
Alaska Airlines direct (2h24m)
inbound: Jun 3, 2018
7:15p ONT » 9:50p SEA
Alaska Airlines direct (2h35m)
Return
Departure
Find the cheapest Seattle Ontario flight by browsing the dates below to find alternative flight prices found in the last days. To launch a flight search for Seattle - Ontario with these new dates, click on an offer. Want to depart from another city? Choose: Las Vegas - Ontario New York - Ontario London - Ontario San Francisco - Ontario See more routes

Airlines operating flights from Seattle to Ontario

  • any
  • May 2018
  • June 2018
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • all
  • Alaska Airlines
  • Delta Air Lines
  • United Airlines
United Airlines
outbound: May 30, 2018
United Airlines 1 stop
return: Jun 2, 2018
United Airlines 1 stop
Delta Air Lines
outbound: May 30, 2018
Delta Air Lines 1 stop
return: Jun 2, 2018
Alaska Airlines direct
Alaska Airlines
outbound: May 30, 2018
Alaska Airlines direct
return: Jun 2, 2018
Alaska Airlines direct

Travel tips for flights Seattle - Ontario

Average flight duration: 2h29m (direct flight)

  • Arrival city:
  • Ontario, USA
  • Airport(s):
  • Ontario International Airport (ONT)
  • Local time:
  • May 21, 2018 12:18 AM, GMT-7
  • Departure city:
  • Seattle, USA
  • Airport(s):
  • Kenmore Air Harbor Seaplane Base (LKE)
  • Seattle–Tacoma International Airport (SEA)
  • Local time:
  • May 21, 2018 12:18 AM, GMT-7
  • Weather:
  • min. 56ºF, max. 69ºF