SEA to ONT

Seattle to Ontario flight ticket price

Compare fares, departure times, stops and baggage details for this route, then open the full search when you are ready to check current availability and complete booking.

SEA
Seattle (SEA), United StatesSeattle/tacoma International
ONT
Ontario (ONT), United StatesOntario International
Search

Live flights for Sat, 06 Jun 2026

Review fares, stops, timings and baggage. Use Search or View all flights for the complete search result.

Showing flight options for the selected travel date.
Currency: USD
Sat, 06 JunSEA to ONT$387 Sun, 07 JunSEA to ONT Mon, 08 JunSEA to ONT Tue, 09 JunSEA to ONT Wed, 10 JunSEA to ONT Thu, 11 JunSEA to ONT Fri, 12 JunSEA to ONT
Sort By:DepartureDurationArrivalPrice
United Airlines
United Airlines
UA-1915
05:07
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
7H :31 M
1 Stop
DEN · 2h 30mDenver (DEN), United States
12:38
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
United Airlines
United Airlines
UA-5676
06:08
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
6H :04 M
1 Stop
SFO · 2h 12mSan Francisco (SFO), United States
12:12
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
American Airlines
American Airlines
AA-3792
06:20
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
5H :44 M
1 Stop
PHX · 1h 26mPhoenix (PHX), United States
12:04
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
United Airlines
United Airlines
UA-737
10:29
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
7H :27 M
1 Stop
SFO · 3h 30mSan Francisco (SFO), United States
17:56
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
United Airlines
United Airlines
UA-1351
12:50
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
7H :56 M
1 Stop
DEN · 2h 42mDenver (DEN), United States
20:46
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
American Airlines
American Airlines
AA-3440
15:20
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
6H :42 M
1 Stop
PHX · 2h 23mPhoenix (PHX), United States
22:02
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
United Airlines
United Airlines
UA-325
15:30
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
7H :20 M
1 Stop
SFO · 3h 29mSan Francisco (SFO), United States
22:50
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
United Airlines
United Airlines
UA-2866
17:20
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
5H :30 M
1 Stop
SFO · 1h 36mSan Francisco (SFO), United States
22:50
2026-06-06
Ontario (ONT)United StatesOntario International
$387
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-4070
08:25
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
2H :45 M
Non Stop
11:10
2026-06-06
Ontario (ONT)United StatesOntario International
$392
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-3840
09:45
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
2H :48 M
Non Stop
12:33
2026-06-06
Ontario (ONT)United StatesOntario International
$392
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-4031
14:30
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
2H :35 M
Non Stop
17:05
2026-06-06
Ontario (ONT)United StatesOntario International
$392
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-3884
19:50
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
2H :42 M
Non Stop
22:32
2026-06-06
Ontario (ONT)United StatesOntario International
$392
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-1128
05:30
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
6H :49 M
1 Stop
SLC · 2h 54mSalt Lake City (SLC), United States
12:19
2026-06-06
Ontario (ONT)United StatesOntario International
$402
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-2858
07:15
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
5H :04 M
1 Stop
SLC · 1h 01mSalt Lake City (SLC), United States
12:19
2026-06-06
Ontario (ONT)United StatesOntario International
$402
total fare
Non Refundable 9 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-1364
08:30
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
2H :40 M
Non Stop
11:10
2026-06-06
Ontario (ONT)United StatesOntario International
$419
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-625
12:30
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
2H :39 M
Non Stop
15:09
2026-06-06
Ontario (ONT)United StatesOntario International
$419
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-592
16:25
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
2H :37 M
Non Stop
19:02
2026-06-06
Ontario (ONT)United StatesOntario International
$419
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-3034
08:45
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
6H :10 M
1 Stop
PDX · 2h 51mPortland (PDX), United States
14:55
2026-06-06
Ontario (ONT)United StatesOntario International
$480
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-3493
10:25
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
6H :52 M
1 Stop
BOI · 3h 12mBoise (BOI), United States
17:17
2026-06-06
Ontario (ONT)United StatesOntario International
$480
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-2325
11:39
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
5H :38 M
1 Stop
BOI · 2h 04mBoise (BOI), United States
17:17
2026-06-06
Ontario (ONT)United StatesOntario International
$480
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-467
13:04
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
4H :13 M
1 Stop
BOI · 0h 40mBoise (BOI), United States
17:17
2026-06-06
Ontario (ONT)United StatesOntario International
$480
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Alaska Airlines
Alaska Airlines
AS-3258
17:40
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
6H :16 M
1 Stop
PDX · 2h 48mPortland (PDX), United States
23:56
2026-06-06
Ontario (ONT)United StatesOntario International
$480
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included

Recommended hotels in Ontario

Stay options near the arrival city for the same travel date.

Search hotels
Holiday Inn Ontario
3.0Very GoodLive availability

Holiday Inn Ontario

- 1249 Tapadera Ave 97914 Ontario OR US,

Free WiFiACBreakfast
Room availability is checked live
$184per night+ taxes if applicable

1 Night • 3 Star

Super 8 By Wyndham Ontario
2.0Very GoodLive availability

Super 8 By Wyndham Ontario

- 615 E Idaho Ave, Ontario, OR 97914 ,

Free WiFiACBreakfast
Room availability is checked live
$113per night+ taxes if applicable

1 Night • 2 Star

Motel6 Ontario, OR
2.0Very GoodLive availability

Motel6 Ontario, OR

- 275 Northeast 12th Street 97914 Ontario (OR) Oregon USA,

Free WiFiACBreakfast
Room availability is checked live
$116per night+ taxes if applicable

1 Night • 2 Star

Best Western Inn & Suites
2.0Very GoodLive availability

Best Western Inn & Suites

- 251 Goodfellow St, Ontario, OR 97914 ,

Free WiFiACBreakfast
Room availability is checked live
$216per night+ taxes if applicable

1 Night • 2 Star

Alaska Airlines
Alaska Airlines
AS-2107
19:25
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
4H :31 M
1 Stop
PDX · 1h 10mPortland (PDX), United States
23:56
2026-06-06
Ontario (ONT)United StatesOntario International
$480
total fare
Non Refundable 7 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-1016
09:25
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
6H :52 M
1 Stop
SLC · 2h 51mSalt Lake City (SLC), United States
16:17
2026-06-06
Ontario (ONT)United StatesOntario International
$563
total fare
Non Refundable 2 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-1165
17:45
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
5H :00 M
1 Stop
SLC · 1h 01mSalt Lake City (SLC), United States
22:45
2026-06-06
Ontario (ONT)United StatesOntario International
$563
total fare
Non Refundable 6 Seat Left Economy
Cabin: Included
Delta Air Lines
Delta Air Lines
DL-1265
10:59
2026-06-06
SEATTLE (SEA)United StatesSeattle/tacoma International
5H :18 M
1 Stop
SLC · 1h 16mSalt Lake City (SLC), United States
16:17
2026-06-06
Ontario (ONT)United StatesOntario International
$644
total fare
Non Refundable 1 Seat Left Economy
Cabin: Included
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Fare highlights

Selected flight highlights for 06 Jun 2026.

Open full search
Lowest fare $387 United Airlines 05:07
Earliest departure $387 United Airlines 05:07
Shortest duration $392 Delta Air Lines 14:30
Night 00:00-05:59 $387 United Airlines at 05:07
Morning 06:00-11:59 $387 United Airlines at 06:08
Afternoon 12:00-17:59 $387 United Airlines at 12:50
Evening 18:00-23:59 $392 Delta Air Lines at 19:50

Seattle to Ontario route details

Seattle (SEA)

Seattle/tacoma International

United States

GMT -8

Latitude: 47.449001

Longitude: -122.308998

Ontario (ONT)

Ontario International

United States

GMT -8

Latitude: 34.055999755859375

Longitude: -117.60099792480469

Distance: Seattle (SEA), United States to Ontario (ONT), United States - 1,540.37 km
Flights shown for 06 Jun 2026. View all flights opens the complete search result.

Seattle to Ontario - what to expect when booking

The SEA to ONT cards above show selected flight options. Airline prices and seat availability can move quickly, so the final fare is rechecked in the booking flow.

Approx route distance: 1,540.37 km.

Before you book

Compare nearby dates

The date strip opens the complete search result for the route and selected date.

Use filters

Shortlist by price, stops, departure time and refundable fare preference.

Check fare rows

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More flights from Seattle (SEA)23 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 → ORD
Seattle → Colorado Springs
SEA → COS
Seattle → Dallas
SEA → DAL
Seattle → Denver
SEA → DEN
Seattle → Detroit Mi
SEA → DTW
Seattle → Dubai
SEA → DXB
Seattle → Edmonton
SEA → YEG
Seattle → Eugene
SEA → EUG
Seattle → Fairbanks
SEA → FAI
More flights from Ontario (ONT)15 routes
Ontario → Chicago
ONT → MDW
Ontario → Denver
ONT → DEN
Ontario → Dallas
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
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
Ontario → Seattle
ONT → SEA
Frequently asked questions - Seattle to Ontario flights
Generally yes. When your travel date is fixed, comparing live fares early gives you better visibility of timings, baggage and fare rules before prices change.
The approximate route distance between Seattle (SEA) and Ontario (ONT) is 1,540.37 km. Actual flying distance can vary by airline routing.
Availability changes by airline schedule and date. Use the Stops filter to quickly check non-stop, one-stop and connecting options on this landing page.
Airline inventory can change within minutes. Book Now sends the selected result to the review flow where the fare is checked again before final booking.
Yes. The date strip and search box open the full search for the selected date, while this page keeps the route details easy to compare.