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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)
Sun, 6 sep
2h 51min
Direct
21:45
Ontario (ONT)
Sun, 6 sep
81 $
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Wed, 9 sep
2h 52min
Direct
20:45
Ontario (ONT)
Wed, 9 sep
62 $
Frontier Airlines
F9 2276
17:53
Seattle, Tacoma (SEA)
Thu, 10 sep
2h 52min
Direct
20:45
Ontario (ONT)
Thu, 10 sep
81 $
Frontier Airlines
F9 2276
17:53
Seattle, Tacoma (SEA)
Fri, 11 sep
2h 52min
Direct
20:45
Ontario (ONT)
Fri, 11 sep
158 $
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Sat, 12 sep
2h 52min
Direct
20:45
Ontario (ONT)
Sat, 12 sep
62 $
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Mon, 14 sep
2h 52min
Direct
20:45
Ontario (ONT)
Mon, 14 sep
49 $
Frontier Airlines
F9 3406
23:27
Seattle, Tacoma (SEA)
Tue, 15 sep
7h 20min
1 stop
06:47
Ontario (ONT)
Wed, 16 sep +1
145 $
Frontier Airlines
F9 2276 🔥 Hot deal
17:53
Seattle, Tacoma (SEA)
Thu, 24 sep
2h 52min
Direct
20:45
Ontario (ONT)
Thu, 24 sep
56 $
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
33 $

Low price calendar

September 2026
Price chart (September 2026)
min: 56 $ · max: 158 $
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56 $
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Cheap flights Seattle to Ontario

Frontier Airlines
Frontier Airlines
Mon, Tue, Wed, Thu, Fri, Sat, Sun
Price from
$62

Popular destinations from Seattle

All →
SEA
Seattle — Las Vegas
United States → United States
LAS
from
$21
SEA
Seattle — Los Angeles
United States → United States
LAX
from
$22
SEA
Seattle — Denver
United States → United States
DEN
from
$25
SEA
Seattle — San Jose
United States → United States
SJC
from
$42
SEA
Seattle — San Francisco
United States → United States
SFO
from
$45
SEA
Seattle — Oakland
United States → United States
OAK
from
$45
SEA
Seattle — Phoenix
United States → United States
PHX
from
$49
SEA
Seattle — San Diego
United States → United States
SAN
from
$52

Popular destinations to Ontario

All →
LAS
Las Vegas — Ontario
United States → United States
ONT
from
$21
SFO
San Francisco — Ontario
United States → United States
ONT
from
$21
HOU
Houston — Ontario
United States → United States
ONT
from
$36
DEN
Denver — Ontario
United States → United States
ONT
from
$39
DFW
Dallas — Ontario
United States → United States
ONT
from
$54
SJC
San Jose — Ontario
United States → United States
ONT
from
$54
NYC
New York — Ontario
United States → United States
ONT
from
$72
ATL
Atlanta — Ontario
United States → United States
ONT
from
$76

Cheap flights Seattle to Ontario

Interesting facts about the route

Flight time

2h 52min

Distance

1 539 km

Average price

$71

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

$9

Buy

change

2 GB

data

15

days

$13

Buy

change

5 GB

data

30

days

$14

Buy

change

3 GB

data

30

days

$16

Buy

change

5 GB

data

30

days

$23

Buy

Frequently Asked Questions

The average ticket price Seattle Ontario is $71. The cheapest ticket costs $81, operated by Frontier Airlines, flight 2276, departing Seattle on 10 September at 17:53, arriving Ontario on 10 September at 20:45.
The average flight time is 2 hours 52 minutes. The fastest flight takes 2 hours 52 minutes, flight 2276 operated by Frontier Airlines, departing Seattle on 10 September at 17:53, arriving Ontario on 10 September at 20:45.
Flights on the Seattle - Ontario route are operated by the following airlines: Frontier Airlines.
The distance from Seattle to Ontario is 1539 km.