What airlines fly to Key West?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Key West from Ontario according to our data. American Airlines is the first choice among our users, with 84% of people opting to fly with this airline when traveling to Key West. Keep in mind that there are 3 different airlines that fly to Key West on a routine basis, so you have a few additional options to choose from.

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

Delta and United Airlines are the most popular carriers operating from Ontario to Key West

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 many operators does momondo search for flights from Ontario Airport to Key West Airport?

As of September 2025, there is 1 operator available to choose from for flights from Ontario Airport to Key West Airport.

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.

$214 Cheap Flights from Ontario to Key West in 2025/26

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Find the cheapest flights from Ontario to Key West

Round-trip

One-way

Cheap round-trip flights

7:05 am - 5:12 pmONT-EYW

7h 07m1 stop

2:00 pm - 7:15 pmEYW-ONT

8h 15m1 stop

$464Delta

Find Deal

Sat, Sep 27 - Wed, Oct 1

7:05 am - 5:12 pmONT-EYW

7h 07m1 stop

2:00 pm - 11:42 pmEYW-ONT

12h 42m2 stops

$469Delta

Find Deal

Sat, Sep 27 - Wed, Oct 1

10:34 pm - 1:00 pmONT-EYW

11h 26m2 stops

1:45 pm - 7:39 pmEYW-ONT

8h 54m1 stop

$483American Airlines

Find Deal

Mon, Dec 8 - Mon, Dec 15

10:34 pm - 1:00 pmONT-EYW

11h 26m2 stops

7:00 am - 6:17 pmEYW-ONT

14h 17m2 stops

$488American Airlines

Find Deal

Mon, Dec 8 - Mon, Dec 15

10:35 pm - 12:05 pmONT-EYW

10h 30m1 stop

3:45 pm - 9:24 pmEYW-ONT

8h 39m1 stop

$514American Airlines

Find Deal

Sat, Sep 27 - Wed, Oct 1

10:35 pm - 12:05 pmONT-EYW

10h 30m1 stop

11:25 am - 6:54 pmEYW-ONT

10h 29m2 stops

$519American Airlines

Find Deal

Sat, Sep 27 - Wed, Oct 1

6:39 pm - 1:02 pmONT-EYW

15h 23m2 stops

6:05 pm - 12:47 pmEYW-ONT

21h 42m2 stops

$549United Airlines

Find Deal

Mon, Jan 5 - Fri, Jan 9

1:33 pm - 3:19 pmONT-EYW

22h 46m2 stops

4:00 pm - 10:31 pmEYW-ONT

9h 31m1 stop

$609United Airlines

Find Deal

Tue, Nov 18 - Sun, Nov 23

5:05 am - 3:09 pmONT-EYW

31h 04m2 stops

4:10 pm - 12:38 pmEYW-ONT

23h 28m2 stops

$641United Airlines

Find Deal

Mon, Dec 15 - Tue, Dec 23

7:05 am - 5:15 pmONT-EYW

7h 10m1 stop

6:10 pm - 10:23 pmEYW-ONT

7h 13m1 stop

$912Delta

Find Deal

Wed, Oct 1 - Sun, Oct 5

American Airlines flights from Ontario to Key West

Our best American Airlines deals on Ontario to Key West flight tickets

American Airlines

Dec 8

ONT10:34 pmOntario

11h 26m

2 stops

EYW1:00 pmKey West

Dec 15

EYW1:45 pmKey West

8h 54m

1 stop

ONT7:39 pmOntario

$483

Find similar

American Airlines

Dec 8

ONT10:34 pmOntario

11h 26m

2 stops

EYW1:00 pmKey West

Dec 15

EYW7:00 amKey West

14h 17m

2 stops

ONT6:17 pmOntario

$488

Find similar

American Airlines

Sep 27

ONT10:35 pmOntario

10h 30m

1 stop

EYW12:05 pmKey West

Oct 1

EYW3:45 pmKey West

8h 39m

1 stop

ONT9:24 pmOntario

$514

Find similar

United Airlines flights from Ontario to Key West

Our best United Airlines deals on Ontario to Key West flight tickets

United Airlines

Jan 5

ONT6:39 pmOntario

15h 23m

2 stops

EYW1:02 pmKey West

Jan 9

EYW6:05 pmKey West

21h 42m

2 stops

ONT12:47 pmOntario

$549

Find similar

United Airlines

Nov 18

ONT1:33 pmOntario

22h 46m

2 stops

EYW3:19 pmKey West

Nov 23

EYW4:00 pmKey West

9h 31m

1 stop

ONT10:31 pmOntario

$609

Find similar

United Airlines

Dec 15

ONT5:05 amOntario

31h 04m

2 stops

EYW3:09 pmKey West

Dec 23

EYW4:10 pmKey West

23h 28m

2 stops

ONT12:38 pmOntario

$641

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 9/27

7:05 am-5:12 pm

1 stop7h 07m

Key West

Wed 10/1

2:00 pm-7:15 pm

1 stop8h 15m

$464

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 9/27

7:05 am-5:12 pm

1 stop7h 07m

Key West

Wed 10/1

2:00 pm-11:42 pm

2 stops12h 42m

$469

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 12/8

10:34 pm-1:00 pm

2 stops11h 26m

Key West

Mon 12/15

1:45 pm-7:39 pm

1 stop8h 54m

$483

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 12/8

10:34 pm-1:00 pm

2 stops11h 26m

Key West

Mon 12/15

7:00 am-6:17 pm

2 stops14h 17m

$488

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 9/27

10:35 pm-12:05 pm

1 stop10h 30m

Key West

Wed 10/1

3:45 pm-9:24 pm

1 stop8h 39m

$514

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 9/27

10:35 pm-12:05 pm

1 stop10h 30m

Key West

Wed 10/1

11:25 am-6:54 pm

2 stops10h 29m

$519

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 1/5

6:39 pm-1:02 pm

2 stops15h 23m

Key West

Fri 1/9

6:05 pm-12:47 pm

2 stops21h 42m

$549

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Tue 11/18

1:33 pm-3:19 pm

2 stops22h 46m

Key West

Sun 11/23

4:00 pm-10:31 pm

1 stop9h 31m

$609

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 12/15

5:05 am-3:09 pm

2 stops31h 04m

Key West

Tue 12/23

4:10 pm-12:38 pm

2 stops23h 28m

$641

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 10/1

7:05 am-5:15 pm

1 stop7h 10m

Key West

Sun 10/5

6:10 pm-10:23 pm

1 stop7h 13m

$912

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest day to depart on your flight to Key West?

On average, the least expensive day to fly to Key West from Ontario is on a Saturday. momondo users have found tickets for Saturday departures for as low as $447. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Key West for around $597.

What is the cheapest time of day to depart on your flight to Key West?

According to our data, the cheapest time of day to fly to Key West is in the morning. momondo users have found flights departing from Ontario to Key West in the morning for as low as $496. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Key West are more costly in the evening, with an average ticket price of $594. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

Direct flights	None

There are no direct flights from Ontario to Key West. There are no popular flight routes from Ontario to Key West.

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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 7h 03m 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 many operators does momondo search for flights from Ontario Airport to Key West Airport?
As of September 2025, there is 1 operator available to choose from for flights from Ontario Airport to Key West Airport.
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.
What is the most popular airline from Ontario to Key West?
momondo data reveals that the most frequently booked airline on the route from Ontario to Key West is American Airlines, representing 100% of all bookings.

Best airlines flying from Ontario to Key West

Compare and see reviews for airlines that fly from Ontario to Key West with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $314	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights

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.