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Cheap flights from Ontario to Key West from $464

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to Key West

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:52 am - 2:16 pmONT  Ontario-EYW Key West
23h 24m2 stops Denver Intl Tampa
Multiple Airlines Logo
9:46 pm - 12:14 amEYW  Key West-ONT Ontario
29h 28m2 stops Tampa St. Petersburg Denver Intl
$484Multiple Airlines
Wed, Nov 18 - Sat, Nov 21
Multiple Airlines Logo
11:52 am - 12:19 pmONT  Ontario-EYW Key West
21h 27m2 stops Denver Intl Tampa
Multiple Airlines Logo
12:01 pm - 10:45 amEYW  Key West-ONT Ontario
25h 44m2 stops Tampa Denver Intl
$554Multiple Airlines
Sun, Nov 15 - Thu, Nov 19
United Airlines Logo
11:52 pm - 11:41 amONT  Ontario-EYW Key West
8h 49m1 stop Chicago O'Hare Intl
United Airlines Logo
4:04 pm - 10:31 pmEYW  Key West-ONT Ontario
9h 27m1 stop Chicago O'Hare Intl
$589United Airlines
Tue, Dec 22 - Fri, Dec 25
United Airlines Logo
11:52 pm - 11:41 amONT  Ontario-EYW Key West
8h 49m1 stop Chicago O'Hare Intl
United Airlines Logo
4:04 pm - 10:31 pmEYW  Key West-ONT Ontario
9h 27m1 stop Chicago O'Hare Intl
$589United Airlines
Mon, Dec 21 - Fri, Dec 25
Delta Logo
7:06 am - 5:24 pmONT  Ontario-EYW Key West
7h 18m1 stop Atlanta Hartsfield-Jackson
Delta Logo
11:48 am - 10:09 pmEYW  Key West-ONT Ontario
13h 21m2 stops Atlanta Hartsfield-Jackson Salt Lake City
$623Delta
Mon, Dec 21 - Fri, Dec 25
Multiple Airlines Logo
11:30 am - 10:04 amONT  Ontario-EYW Key West
19h 34m2 stops Denver Intl Tampa
Multiple Airlines Logo
10:45 am - 10:17 pmEYW  Key West-ONT Ontario
14h 32m2 stops Tampa Denver Intl
$624Multiple Airlines
Fri, Dec 4 - Sat, Dec 12
Delta Logo
7:05 am - 8:01 pmONT  Ontario-EYW Key West
9h 56m1 stop Atlanta Hartsfield-Jackson
Delta Logo
2:06 pm - 7:55 pmEYW  Key West-ONT Ontario
8h 49m1 stop Atlanta Hartsfield-Jackson
$669Delta
Sat, Dec 5 - Sat, Dec 12
United Airlines Logo
11:52 pm - 11:41 amONT  Ontario-EYW Key West
8h 49m1 stop Chicago O'Hare Intl
United Airlines Logo
4:04 pm - 10:31 pmEYW  Key West-ONT Ontario
9h 27m1 stop Chicago O'Hare Intl
$679United Airlines
Sat, Dec 19 - Thu, Dec 24
Delta Logo
7:06 am - 5:24 pmONT  Ontario-EYW Key West
7h 18m1 stop Atlanta Hartsfield-Jackson
Delta Logo
11:48 am - 10:09 pmEYW  Key West-ONT Ontario
13h 21m2 stops Atlanta Hartsfield-Jackson Salt Lake City
$682Delta
Tue, Dec 22 - Fri, Dec 25
Delta Logo
5:05 pm - 10:53 amONT  Ontario-EYW Key West
14h 48m2 stops Salt Lake City Atlanta Hartsfield-Jackson
Delta Logo
7:15 am - 10:00 amEYW  Key West-ONT Ontario
29h 45m1 stop Atlanta Hartsfield-Jackson
$688Delta
Sun, Dec 20 - Sat, Dec 26

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United Airlines flights from Ontario to Key West

Our best United Airlines deals on Ontario to Key West flight tickets
United Airlines
Dec 21
ONT11:52 pmOntario
8h 49m
1 stop
EYW11:41 amKey West
Dec 25
EYW4:04 pmKey West
9h 27m
1 stop
ONT10:31 pmOntario
$589
United Airlines
Dec 19
ONT11:52 pmOntario
8h 49m
1 stop
EYW11:41 amKey West
Dec 24
EYW4:04 pmKey West
9h 27m
1 stop
ONT10:31 pmOntario
$679
United Airlines
Dec 16
ONT6:00 amOntario
26h 41m
2 stops
EYW11:41 amKey West
Dec 21
EYW4:04 pmKey West
9h 27m
1 stop
ONT10:31 pmOntario
$692

Delta flights from Ontario to Key West

Our best Delta deals on Ontario to Key West flight tickets
Delta
Dec 21
ONT7:06 amOntario
7h 18m
1 stop
EYW5:24 pmKey West
Dec 25
EYW11:48 amKey West
13h 21m
2 stops
ONT10:09 pmOntario
$623
Delta
Dec 5
ONT7:05 amOntario
9h 56m
1 stop
EYW8:01 pmKey West
Dec 12
EYW2:06 pmKey West
8h 49m
1 stop
ONT7:55 pmOntario
$669
Delta
Dec 22
ONT7:06 amOntario
7h 18m
1 stop
EYW5:24 pmKey West
Dec 25
EYW11:48 amKey West
13h 21m
2 stops
ONT10:09 pmOntario
$682

momondo Fare Finder

 
Use the filters below to find and compare flights from Ontario to Key West that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Wed 11/18

11:52 am-2:16 pm

2 stops23h 24m

Key West

Sat 11/21

9:46 pm-12:14 am

2 stops29h 28m

$484

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Sun 11/15

11:52 am-12:19 pm

2 stops21h 27m

Key West

Thu 11/19

12:01 pm-10:45 am

2 stops25h 44m

$554
Quickest round-trip

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Tue 12/22

11:52 pm-11:41 am

1 stop8h 49m

Key West

Fri 12/25

4:04 pm-10:31 pm

1 stop9h 27m

$589

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Mon 12/21

11:52 pm-11:41 am

1 stop8h 49m

Key West

Fri 12/25

4:04 pm-10:31 pm

1 stop9h 27m

$589

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Mon 12/21

7:06 am-5:24 pm

1 stop7h 18m

Key West

Fri 12/25

11:48 am-10:09 pm

2 stops13h 21m

$623

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Fri 12/4

11:30 am-10:04 am

2 stops19h 34m

Key West

Sat 12/12

10:45 am-10:17 pm

2 stops14h 32m

$624

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Sat 12/5

7:05 am-8:01 pm

1 stop9h 56m

Key West

Sat 12/12

2:06 pm-7:55 pm

1 stop8h 49m

$669

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Sat 12/19

11:52 pm-11:41 am

1 stop8h 49m

Key West

Thu 12/24

4:04 pm-10:31 pm

1 stop9h 27m

$679

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Tue 12/22

7:06 am-5:24 pm

1 stop7h 18m

Key West

Fri 12/25

11:48 am-10:09 pm

2 stops13h 21m

$682

OntarioKey West

ONT Ontario - EYW Key West

ONTEYW

Ontario

Sun 12/20

5:05 pm-10:53 am

2 stops14h 48m

Key West

Sat 12/26

7:15 am-10:00 am

1 stop29h 45m

$688

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to Key West from

How to get the cheapest flight ticket from Ontario to Key West

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Key West?

United Airlines is the most popular carrier operating from Ontario to Key West

When to book flights from Ontario to Key West

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Key West according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Key West (ONT to EYW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Key West

Best Price Found

$464

Fastest flight time

6h 55m

Direct flights

None
The best one-way flight to Key West from Ontario in the past 72 hours is $464. The best round-trip flight deal from Ontario to Key West found on momondo in the last 72 hours is $484.
The fastest flight from Ontario to Key West takes 6h 55m
There are no direct flights from Ontario to Key West. There are no popular flight routes from Ontario to Key West.
Search flight deals

Frequently asked questions about flying from Ontario to Key West

  • How far is Ontario to Key West by plane?

    The straight-line distance from Ontario to Key West is 2243.1 mi. Typically, this will take 6h 55m by plane in normal conditions.

  • When did momondo last update prices for flights from Ontario Airport to Key West Airport?

    Prices for flights from Ontario Airport to Key West Airport are updated daily.

  • How old do you have to be to fly from Ontario Airport to Key West Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Key West Airport.

  • What documentation or ID do you need to fly to Key West Airport?

    The travel and health documents required for your trip to Key West Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Key West Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key
Little Torch Key

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Key West?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Key West from Ontario.

Can I find flights from Ontario to Key West with flexible booking policies on momondo?

All flight searches from Ontario to Key West on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Key West?

Once all potential Ontario to Key West flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Key West right now. Can momondo alert me if prices change?

Price alerts on flights to Key West from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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