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

Find cheap airline tickets from Seattle to Ontario by date

  • any
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • May 2019
  • June 2019
  • any
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • May 2019
  • June 2019
  • price
  • month of departure
  • month of return
$225
outward: Aug 16, 2018
3:00p SEA » 11:39p LAX
Spirit Airlines 1 stop (8h39m)
inbound: Aug 19, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
$225
outward: Aug 16, 2018
3:00p SEA » 11:39p LAX
Spirit Airlines 1 stop (8h39m)
inbound: Aug 19, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
$225
outward: Aug 16, 2018
3:00p SEA » 11:39p LAX
Spirit Airlines 1 stop (8h39m)
inbound: Aug 19, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
$231
outward: Sep 6, 2018
9:55a SEA » 8:01p SNA
Frontier Airlines 1 stop (10h06m)
inbound: Sep 16, 2018
8:51p SNA » 7:22a SEA
Frontier Airlines 1 stop (10h31m)
$236
outward: Sep 25, 2018
12:15a SEA » 6:58a LAX
Spirit Airlines 1 stop (6h43m)
inbound: Sep 28, 2018
3:00p LAX » 8:23p SEA
Spirit Airlines 1 stop (5h23m)
$241
outward: May 23, 2019
6:30p SEA » 11:41p LAX
United Airlines 1 stop (5h11m)
inbound: May 30, 2019
10:00p LAX » 2:00a SEA
United Airlines 1 stop (4h)
$244
outward: Aug 5, 2018
2:30a SEA » 8:30a LAX
Southwest Airlines 1 stop (6h)
inbound: Aug 7, 2018
2:50a LAX » 7:00a SEA
Southwest Airlines 1 stop (4h10m)
$246
outward: Aug 1, 2018
2:30p SEA » 7:34p LAX
United Airlines 1 stop (5h04m)
inbound: Aug 2, 2018
5:08a BUR » 10:14a SEA
United Airlines 1 stop (5h06m)
$250
outward: Aug 11, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
inbound: Aug 18, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
$250
outward: Aug 11, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
inbound: Aug 18, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
$250
outward: Aug 11, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
inbound: Aug 18, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
$254
outward: Aug 2, 2018
2:30p SEA » 8:09p ONT
United Airlines 1 stop (5h39m)
inbound: Aug 7, 2018
4:35a ONT » 10:14a SEA
United Airlines 1 stop (5h39m)
$254
outward: Aug 11, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
inbound: Aug 18, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
$256
outward: Aug 6, 2018
5:50p SEA » 2:24a LAX
Spirit Airlines 1 stop (8h34m)
inbound: Aug 10, 2018
3:05p LAX » 4:17a SEA
Spirit Airlines 1 stop (13h12m)
$260
outward: Aug 6, 2018
5:50p SEA » 2:24a LAX
Spirit Airlines 1 stop (8h34m)
inbound: Aug 10, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
$261
outward: Aug 7, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
inbound: Aug 10, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
$278
outward: Dec 26, 2018
8:40p SEA » 4:12a ONT
United Airlines 1 stop (7h32m)
inbound: Jan 2, 2019
3:00p ONT » 8:40p SEA
United Airlines 1 stop (5h40m)
$278
outward: Dec 26, 2018
8:40p SEA » 4:12a ONT
United Airlines 1 stop (7h32m)
inbound: Jan 2, 2019
3:00p ONT » 8:40p SEA
United Airlines 1 stop (5h40m)
$333
outward: Dec 28, 2018
11:00p SEA » 4:12a ONT
United Airlines 1 stop (5h12m)
inbound: Jan 1, 2019
3:00p ONT » 8:40p SEA
United Airlines 1 stop (5h40m)
$368
outward: Dec 28, 2018
11:00p SEA » 4:12a ONT
United Airlines 1 stop (5h12m)
inbound: Jan 1, 2019
3:00p ONT » 8:40p SEA
United Airlines 1 stop (5h40m)
$368
outward: Dec 28, 2018
11:00p SEA » 4:12a ONT
United Airlines 1 stop (5h12m)
inbound: Jan 1, 2019
3:00p ONT » 8:40p SEA
United Airlines 1 stop (5h40m)
Return
Departure
Choose when you'd like to depart to Ontario (USA):
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
  • July 2018
  • August 2018
  • September 2018
  • October 2018
  • November 2018
  • December 2018
  • January 2019
  • February 2019
  • March 2019
  • April 2019
  • May 2019
  • June 2019
  • all
  • Alaska Airlines
  • Delta Air Lines
  • United Airlines
United Airlines
outbound: Jul 31, 2018
United Airlines 1 stop
return: Nov 3, 2018
United Airlines 1 stop
Alaska Airlines
outbound: Aug 1, 2018
Alaska Airlines direct
return: Aug 1, 2018
Alaska Airlines direct
Delta Air Lines
outbound: Dec 26, 2018
Delta Air Lines 1 stop
return: Jan 2, 2019
Delta Air Lines 2 stops

Travel tips for flights Seattle - Ontario

Average flight duration: 7h15m (flight with stopovers)

  • Arrival city:
  • Ontario, USA
  • Airport(s):
  • Ontario International Airport (ONT)
  • Local time:
  • Jul 19, 2018 6:55 AM, GMT-7
  • Weather:
  • min. 69ºF, max. 91ºF
  • Departure city:
  • Seattle, USA
  • Airport(s):
  • Kenmore Air Harbor Seaplane Base (LKE)
  • Seattle–Tacoma International Airport (SEA)
  • Local time:
  • Jul 19, 2018 6:55 AM, GMT-7
  • Weather:
  • min. 57ºF, max. 73ºF