Delta Air Lines
DL-1045
12:00
04/14/2026
LAX
2h 51m
Non-stop
14:51
04/14/2026
SEA
₹10,106
per person
Delta Air Lines
DL-2606
15:35
04/14/2026
LAX
2h 51m
Non-stop
18:26
04/14/2026
SEA
₹10,106
per person
Delta Air Lines
DL-2980
07:00
04/14/2026
LAX
2h 53m
Non-stop
09:53
04/14/2026
SEA
₹10,106
per person
Southwest Airlines Dallas
WN-1353
15:45
04/14/2026
ONT
7h 10m
1 Stop
⏱ SMF · 3h 40m
22:55
04/14/2026
SEA
₹10,549
per person
Southwest Airlines Dallas
WN-3675
06:40
04/14/2026
ONT
6h 45m
1 Stop
⏱ SMF · 3h 15m
13:25
04/14/2026
SEA
₹10,549
per person
Southwest Airlines Dallas
WN-3680
17:20
04/14/2026
ONT
5h 35m
1 Stop
⏱ SMF · 2h 5m
22:55
04/14/2026
SEA
₹10,549
per person
Southwest Airlines Dallas
WN-3676
09:05
04/14/2026
ONT
4h 20m
1 Stop
⏱ SMF · 0h 55m
13:25
04/14/2026
SEA
₹10,549
per person
Delta Air Lines
DL-4031
17:55
04/14/2026
ONT
3h 0m
Non-stop
20:55
04/14/2026
SEA
₹11,036
per person
Delta Air Lines
DL-4070
11:53
04/14/2026
ONT
3h 4m
Non-stop
14:57
04/14/2026
SEA
₹11,036
per person
Delta Air Lines
DL-1293
07:30
04/14/2026
SNA
3h 5m
Non-stop
10:35
04/14/2026
SEA
₹11,036
per person
Delta Air Lines
DL-2218
18:58
04/14/2026
SNA
3h 7m
Non-stop
22:05
04/14/2026
SEA
₹11,036
per person
United Airlines
UA-1375
13:27
04/14/2026
ONT
7h 30m
1 Stop
⏱ SFO · 3h 29m
20:57
04/14/2026
SEA
₹11,329
per person
United Airlines
UA-1375
13:27
04/14/2026
ONT
5h 8m
1 Stop
⏱ SFO · 1h 16m
18:35
04/14/2026
SEA
₹11,329
per person
United Airlines
UA-2363
06:00
04/14/2026
ONT
4h 39m
1 Stop
⏱ SFO · 0h 46m
10:39
04/14/2026
SEA
₹11,525
per person
Southwest Airlines
WN-554
18:10
04/14/2026
BUR
4h 45m
1 Stop
⏱ SMF · 1h 15m
22:55
04/14/2026
SEA
₹11,674
per person
Southwest Airlines
WN-768
08:20
04/14/2026
BUR
5h 5m
1 Stop
⏱ SMF · 1h 40m
13:25
04/14/2026
SEA
₹11,674
per person
Southwest Airlines
WN-3454
15:40
04/14/2026
BUR
5h 20m
1 Stop
⏱ OAK · 1h 50m
21:00
04/14/2026
SEA
₹11,674
per person
Southwest Airlines
WN-4409
08:45
04/14/2026
SNA
4h 40m
1 Stop
⏱ SMF · 1h 10m
13:25
04/14/2026
SEA
₹11,953
per person
United Airlines
UA-5273
12:58
04/14/2026
LAX
3h 6m
Non-stop
16:04
04/14/2026
SEA
₹11,971
per person
Delta Air Lines
DL-1116
12:55
04/14/2026
LGB
5h 35m
1 Stop
⏱ SLC · 1h 20m
18:30
04/14/2026
SEA
₹12,418
per person
United Airlines
UA-2681
18:45
04/14/2026
LAX
4h 42m
1 Stop
⏱ SFO · 0h 44m
23:27
04/14/2026
SEA
₹12,885
per person
United Airlines
UA-469
13:20
04/14/2026
LAX
5h 15m
1 Stop
⏱ SFO · 1h 20m
18:35
04/14/2026
SEA
₹12,885
per person
United Airlines
UA-2019
15:40
04/14/2026
LAX
5h 17m
1 Stop
⏱ SFO · 1h 13m
20:57
04/14/2026
SEA
₹12,885
per person
United Airlines
UA-233
17:27
04/14/2026
LAX
6h 0m
1 Stop
⏱ SFO · 2h 1m
23:27
04/14/2026
SEA
₹12,897
per person
United Airlines
UA-2740
11:43
04/14/2026
LAX
6h 52m
1 Stop
⏱ SFO · 2h 57m
18:35
04/14/2026
SEA
₹12,897
per person
😕 No flights match your filters.
Ontario (ONT)
📍 Ontario International Airport
🌍 United States
🕐 GMT -8
📐 Latitude: 34.055999755859375
📐 Longitude: -117.60099792480469
Seattle (SEA)
📍 Seattle Tacoma International Airport
🌍 United States
🕐 GMT -8
📐 Latitude: 47.449001
📐 Longitude: -122.308998
✈ Distance: Ontario,USA to Seattle,USA — 1540.37 km
📅 Results on this page are loaded for 14 Apr 2026. Click View all flights for the complete live search.
Ontario to Seattle — what to expect when booking
The ONT–SEA route is served by multiple carriers throughout the year. Fares on this route can move quickly — a price available now may not be there 30 minutes later.
If your dates are flexible, try shifting your departure by a day or two using the date strip above. Mid-week departures often show lower base fares compared to weekend starts on many routes.
The distance between Ontario,USA and Seattle,USA is approximately 1540.37 km.
Before you book
Compare nearby dates
The date strip above lets you scan nearby fares without restarting the search.
Open full search for more control
Route page shows a limited live set. Full search opens the complete inventory with fresh results.
Check fare details
Each result shows baggage, refundability and fare details before you proceed.
More flights from Ontario (ONT)
14 routes
More flights from Ontario (ONT)
14 routes
Ontario → Chicago
ONT → MDW
Ontario → Denver
ONT → DEN
Ontario → Fort Worth
ONT → DFW
Ontario → Guadalajara
ONT → GDL
Ontario → Houston
ONT → IAH
Ontario → Las Vegas
ONT → LAS
Ontario → Oakland
ONT → OAK
Ontario → Phoenix
ONT → PHX
Ontario → Portland International
ONT → PDX
Ontario → Sacramento
ONT → SMF
Ontario → Salt Lake City
ONT → SLC
Ontario → San Francisco
ONT → SFO
Ontario → San Jose
ONT → SJC
Ontario → San Juan
ONT → SJU
More flights from Seattle (SEA)
88 routes
More flights from Seattle (SEA)
88 routes
Seattle → Albuquerque
SEA → ABQ
Seattle → Amsterdam
SEA → AMS
Seattle → Anchorage
SEA → ANC
Seattle → Atlanta
SEA → ATL
Seattle → Austin
SEA → AUS
Seattle → Beijing
SEA → PEK
Seattle → Bellingham
SEA → BLI
Seattle → Billings
SEA → BIL
Seattle → Boise
SEA → BOI
Seattle → Boston
SEA → BOS
Seattle → Bozeman
SEA → BZN
Seattle → Burbank
SEA → BUR
Seattle → Calgary
SEA → YYC
Seattle → Charlotte
SEA → CLT
Seattle → Chicago
SEA → MDW
Seattle → Colorado Springs
SEA → COS
Seattle → Dallas
SEA → DAL
Seattle → Denver
SEA → DEN
Seattle → Detroit
SEA → DTW
Seattle → Dubai
SEA → DXB
Seattle → Edmonton
SEA → YEG
Seattle → Eugene
SEA → EUG
Seattle → Fairbanks
SEA → FAI
Seattle → Fort Lauderdale
SEA → FLL
Seattle → Fort Worth
SEA → DFW
Seattle → Frankfurt
SEA → FRA
Seattle → Fresno
SEA → FAT
Seattle → Great Falls
SEA → GTF
Seattle → Helena
SEA → HLN
Seattle → Honolulu
SEA → HNL
Seattle → Houston
SEA → IAH
Seattle → Juneau
SEA → JNU
Seattle → Kahului
SEA → OGG
Seattle → Kalispell
SEA → FCA
Seattle → Kansas City
SEA → MCI
Seattle → Kelowna
SEA → YLW
Seattle → Ketchikan
SEA → KTN
Seattle → Kona
SEA → KOA
Seattle → Las Vegas
SEA → LAS
Seattle → Lewiston
SEA → LWS
Seattle → Lihue
SEA → LIH
Seattle → London
SEA → LHR
Seattle → Long Beach
SEA → LGB
Seattle → Los Angeles
SEA → LAX
Seattle → Medford
SEA → MFR
Seattle → Miami
SEA → MIA
Seattle → Milwaukee
SEA → MKE
Seattle → Minneapolis
SEA → MSP
Seattle → Missula
SEA → MSO
Seattle → New York
SEA → EWR
Seattle → Oakland
SEA → OAK
Seattle → Omaha
SEA → OMA
Seattle → Ontario
SEA → ONT
Seattle → Orlando
SEA → MCO
Seattle → Palm Springs
SEA → PSP
Seattle → Paris
SEA → CDG
Seattle → Pasco
SEA → PSC
Seattle → Philadelphia
SEA → PHL
Seattle → Phoenix
SEA → PHX
Seattle → Portland International
SEA → PDX
Seattle → Pullman
SEA → PUW
Seattle → Redmond
SEA → RDM
Seattle → Reno
SEA → RNO
Seattle → Reykjavik
SEA → KEF
Seattle → Sacramento
SEA → SMF
Seattle → Salt Lake City
SEA → SLC
Seattle → San Antonio
SEA → SAT
Seattle → San Diego
SEA → SAN
Seattle → San Francisco
SEA → SFO
Seattle → San Jose
SEA → SJC
Seattle → Santa Ana
SEA → SNA
Seattle → Santa Barbara
SEA → SBA
Seattle → Santa Rosa
SEA → STS
Seattle → Seoul
SEA → ICN
Seattle → Shanghai
SEA → PVG
Seattle → Spokane
SEA → GEG
Seattle → St. Louis
SEA → STL
Seattle → Taipei
SEA → TPE
Seattle → Tampa
SEA → TPA
Seattle → Tokyo
SEA → HND
Seattle → Toronto
SEA → YYZ
Seattle → Tucson
SEA → TUS
Seattle → Vancouver
SEA → YVR
Seattle → Victoria
SEA → YYJ
Seattle → Walla Walla
SEA → ALW
Seattle → Washington DC
SEA → BWI
Seattle → Wenatchee
SEA → EAT
Seattle → Yakima
SEA → YKM
