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

Find cheap airline tickets from Ontario to Seattle 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
$212
outward: Sep 11, 2018
3:30a LAX » 7:35a SEA
Southwest Airlines 1 stop (4h05m)
inbound: Sep 14, 2018
4:10p SEA » 8:10p LAX
Southwest Airlines 1 stop (4h)
$223
outward: Sep 29, 2018
9:53p ONT » 4:58a SEA
American Airlines 1 stop (7h05m)
inbound: Oct 7, 2018
3:00p SEA » 5:38p LAX
American Airlines direct (2h38m)
$231
outward: Sep 15, 2018
3:00p LAX » 8:23p SEA
Spirit Airlines 1 stop (5h23m)
inbound: Sep 18, 2018
12:15a SEA » 6:58a LAX
Spirit Airlines 1 stop (6h43m)
$231
outward: Jul 26, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Jul 31, 2018
3:00p SEA » 11:43p LAX
Spirit Airlines 1 stop (8h43m)
$233
outward: Jul 26, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Jul 31, 2018
3:00p SEA » 11:43p LAX
Spirit Airlines 1 stop (8h43m)
$237
outward: Feb 22, 2019
10:00p LAX » 2:00a SEA
United Airlines 1 stop (4h)
inbound: Feb 26, 2019
4:50p SEA » 9:14p SNA
United Airlines 1 stop (4h24m)
$238
outward: Oct 12, 2018
3:05p ONT » 7:05p SEA
Southwest Airlines 1 stop (4h)
inbound: Oct 23, 2018
1:25a SEA » 5:40a ONT
Southwest Airlines 1 stop (4h15m)
$240
outward: Oct 4, 2018
11:30p LAX » 3:35a SEA
Southwest Airlines 1 stop (4h05m)
inbound: Oct 7, 2018
3:55p SEA » 8:25p LAX
Southwest Airlines 1 stop (4h30m)
$240
outward: Oct 4, 2018
11:30p LAX » 3:35a SEA
Southwest Airlines 1 stop (4h05m)
inbound: Oct 7, 2018
3:55p SEA » 8:25p LAX
Southwest Airlines 1 stop (4h30m)
$240
outward: Oct 4, 2018
11:30p LAX » 3:35a SEA
Southwest Airlines 1 stop (4h05m)
inbound: Oct 7, 2018
3:55p SEA » 8:25p LAX
Southwest Airlines 1 stop (4h30m)
$240
outward: Oct 4, 2018
11:30p LAX » 3:35a SEA
Southwest Airlines 1 stop (4h05m)
inbound: Oct 7, 2018
3:55p SEA » 8:25p LAX
Southwest Airlines 1 stop (4h30m)
$241
outward: Feb 22, 2019
2:05p LAX » 6:55p SEA
Southwest Airlines 1 stop (4h50m)
inbound: Feb 26, 2019
4:00p SEA » 8:05p LAX
Southwest Airlines 1 stop (4h05m)
$242
outward: Sep 29, 2018
3:37a SNA » 3:33a SEA
Frontier Airlines 1 stop (23h56m)
inbound: Sep 30, 2018
9:55a SEA » 8:01p SNA
Frontier Airlines 1 stop (10h06m)
$242
outward: Jul 26, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Aug 1, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
$245
outward: Jul 26, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Aug 1, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
$248
outward: Jul 26, 2018
6:31p LAX » 7:54a SEA
Spirit Airlines 1 stop (13h23m)
inbound: Aug 1, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
$248
outward: Jul 26, 2018
6:31p LAX » 7:54a SEA
Spirit Airlines 1 stop (13h23m)
inbound: Aug 1, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
$248
outward: Jul 26, 2018
6:31p LAX » 7:54a SEA
Spirit Airlines 1 stop (13h23m)
inbound: Aug 1, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
$257
outward: Aug 31, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
inbound: Sep 3, 2018
12:15a SEA » 6:53a LAX
Spirit Airlines 1 stop (6h38m)
$262
outward: Jul 24, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Aug 3, 2018
3:00p SEA » 11:43p LAX
Spirit Airlines 1 stop (8h43m)
$268
outward: Jul 25, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Jul 31, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
$268
outward: Jul 25, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Jul 31, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
$276
outward: Jul 27, 2018
12:25a LAX » 3:18a SEA
United Airlines direct (2h53m)
inbound: Jul 31, 2018
11:05p SEA » 4:42a LAX
United Airlines direct (5h37m)
$279
outward: Sep 14, 2018
3:00p LAX » 8:23p SEA
Spirit Airlines 1 stop (5h23m)
inbound: Sep 17, 2018
12:15a SEA » 6:58a LAX
Spirit Airlines 1 stop (6h43m)
$299
outward: Jul 26, 2018
3:00p ONT » 7:45p SEA
Delta Air Lines 1 stop (4h45m)
inbound: Aug 1, 2018
3:25a SEA » 7:51a ONT
Delta Air Lines 1 stop (4h26m)
$302
outward: Apr 6, 2019
2:55a BUR » 9:51a SEA
United Airlines 1 stop (6h56m)
inbound: Apr 8, 2019
8:40p SEA » 1:29a LAX
United Airlines 1 stop (4h49m)
$310
outward: Aug 31, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
inbound: Sep 3, 2018
12:15a SEA » 6:53a LAX
Spirit Airlines 1 stop (6h38m)
$310
outward: Aug 31, 2018
3:00p LAX » 11:13p SEA
Spirit Airlines 1 stop (8h13m)
inbound: Sep 3, 2018
12:15a SEA » 6:53a LAX
Spirit Airlines 1 stop (6h38m)
$319
outward: Jul 30, 2018
3:00p ONT » 7:45p SEA
Unknown Airline 1 stop (4h45m)
inbound: Jul 31, 2018
3:25a SEA » 7:51a ONT
Unknown Airline 1 stop (4h26m)
$410
outward: Jul 20, 2018
3:05p LAX » 11:11p SEA
Spirit Airlines 1 stop (8h06m)
inbound: Jul 23, 2018
12:15a SEA » 6:56a LAX
Spirit Airlines 1 stop (6h41m)
Return
Departure
Choose when you'd like to depart to Seattle (USA):
Find the cheapest Ontario Seattle flight by browsing the dates below to find alternative flight prices found in the last days. To launch a flight search for Ontario - Seattle with these new dates, click on an offer. Want to depart from another city? Choose: Las Vegas - Seattle New York - Seattle London - Seattle Miami - Seattle Chicago - Seattle San Francisco - Seattle See more routes

Airlines operating flights from Ontario to Seattle

  • 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
  • American Airlines
  • Delta Air Lines
  • Southwest Airlines
  • United Airlines
Southwest Airlines
outbound: Feb 22, 2019
Southwest Airlines 1 stop
return: Feb 26, 2019
Southwest Airlines 1 stop
Delta Air Lines
outbound: Oct 4, 2018
Delta Air Lines 1 stop
return: Oct 7, 2018
Delta Air Lines 1 stop
United Airlines
outbound: Aug 16, 2018
United Airlines 1 stop
return: Aug 21, 2018
United Airlines 1 stop
Alaska Airlines
outbound: Oct 4, 2018
Alaska Airlines direct
return: Oct 7, 2018
Alaska Airlines direct
American Airlines
outbound: Sep 28, 2018
American Airlines 1 stop
return: Sep 30, 2018
American Airlines direct

Travel tips for flights Ontario - Seattle

Average flight duration: 4h15m (direct flight)

  • Arrival city:
  • Seattle, USA
  • Airport(s):
  • Kenmore Air Harbor Seaplane Base (LKE)
  • Seattle–Tacoma International Airport (SEA)
  • Local time:
  • Jul 15, 2018 5:46 PM, GMT-7
  • Weather:
  • min. 62ºF, max. 86ºF
  • Departure city:
  • Ontario, USA
  • Airport(s):
  • Ontario International Airport (ONT)
  • Local time:
  • Jul 15, 2018 5:46 PM, GMT-7
  • Weather:
  • min. 69ºF, max. 89ºF