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Cheap flights Seattle (Tacoma) to Ontario

1 passenger, economy

Cheap flights Seattle to Ontario

Compare prices, duration and stops

Frontier Airlines
F9 2276 🔥 Hot deal
18:54
Seattle, Tacoma (SEA)
Sat, 5 sep
2h 51min
Direct
21:45
Ontario (ONT)
Sat, 5 sep
81 €
Frontier Airlines
F9 2276 🔥 Hot deal
18:54
Seattle, Tacoma (SEA)
Sun, 6 sep
2h 51min
Direct
21:45
Ontario (ONT)
Sun, 6 sep
70 €
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Wed, 9 sep
2h 52min
Direct
20:45
Ontario (ONT)
Wed, 9 sep
54 €
Frontier Airlines
F9 2276
17:53
Seattle, Tacoma (SEA)
Thu, 10 sep
2h 52min
Direct
20:45
Ontario (ONT)
Thu, 10 sep
69 €
Frontier Airlines
F9 2276
17:53
Seattle, Tacoma (SEA)
Fri, 11 sep
2h 52min
Direct
20:45
Ontario (ONT)
Fri, 11 sep
136 €
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Sat, 12 sep
2h 52min
Direct
20:45
Ontario (ONT)
Sat, 12 sep
54 €
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Mon, 14 sep
2h 52min
Direct
20:45
Ontario (ONT)
Mon, 14 sep
42 €
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Thu, 24 sep
2h 52min
Direct
20:45
Ontario (ONT)
Thu, 24 sep
48 €
Frontier Airlines
F9 2276 🔥 Hot deal Best price
18:50
Seattle, Tacoma (SEA)
Mon, 9 nov
2h 48min
Direct
21:38
Ontario (ONT)
Mon, 9 nov
29 €

Low price calendar

September 2026
Price chart (September 2026)
min: 48 € · max: 136 €
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54 €
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Good deal
48 €
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Cheap flights Seattle to Ontario

Frontier Airlines
Frontier Airlines
Mon, Wed, Thu, Fri, Sat, Sun
Price from
€54

Popular destinations from Seattle

All →
SEA
Seattle — Las Vegas
United States → United States
LAS
from
€18
SEA
Seattle — Los Angeles
United States → United States
LAX
from
€19
SEA
Seattle — Denver
United States → United States
DEN
from
€22
SEA
Seattle — San Jose
United States → United States
SJC
from
€36
SEA
Seattle — Phoenix
United States → United States
PHX
from
€42
SEA
Seattle — San Diego
United States → United States
SAN
from
€45
SEA
Seattle — San Francisco
United States → United States
SFO
from
€46
SEA
Seattle — Oakland
United States → United States
OAK
from
€48

Popular destinations to Ontario

All →
LAS
Las Vegas — Ontario
United States → United States
ONT
from
€18
SFO
San Francisco — Ontario
United States → United States
ONT
from
€18
HOU
Houston — Ontario
United States → United States
ONT
from
€31
DEN
Denver — Ontario
United States → United States
ONT
from
€34
DFW
Dallas — Ontario
United States → United States
ONT
from
€46
SJC
San Jose — Ontario
United States → United States
ONT
from
€46
NYC
New York — Ontario
United States → United States
ONT
from
€62
ATL
Atlanta — Ontario
United States → United States
ONT
from
€66

Cheap flights Seattle to Ontario

Interesting facts about the route

Flight time

2h 52min

Distance

1 539 km

Average price

€54

Most frequent flight

F9 2276

Passenger reviews

No reviews for this route yet

Internet abroad

eSIM · United States

All plans

change

3 GB

data

30

days

€8

Buy

change

2 GB

data

15

days

€11

Buy

change

5 GB

data

30

days

€12

Buy

change

3 GB

data

30

days

€14

Buy

change

5 GB

data

30

days

€19

Buy

Frequently Asked Questions

The average ticket price Seattle Ontario is €54. Check flight options below for current prices.
The average flight time is 2 hours 52 minutes.
Flights on the Seattle - Ontario route are operated by the following airlines: Frontier Airlines.
The distance from Seattle to Ontario is 1539 km.