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.

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 November 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.

$307 Cheap Flights from Ontario to Key West in 2025/26

1 adult

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Find the cheapest flights from Ontario to Key West

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:34 pm - 12:05 pmONT-EYW

10h 31m1 stop

2:36 pm - 9:07 pmEYW-ONT

9h 31m1 stop

$408American Airlines

Find Deal

Sat, Dec 6 - Sat, Dec 13

6:04 am - 3:48 pmONT-EYW

6h 44m1 stop

4:15 pm - 8:58 pmEYW-ONT

31h 43m2 stops

$572United Airlines

Find Deal

Sat, Jan 3 - Thu, Jan 8

7:05 am - 5:15 pmONT-EYW

7h 10m1 stop

7:25 am - 7:50 pmEYW-ONT

15h 25m1 stop

$597Delta

Find Deal

Sun, Dec 7 - Thu, Jan 1

7:05 am - 8:06 pmONT-EYW

10h 01m1 stop

7:25 am - 7:50 pmEYW-ONT

15h 25m1 stop

$667Delta

Find Deal

Sat, Dec 6 - Thu, Jan 1

6:00 am - 4:07 pmONT-EYW

7h 07m1 stop

3:49 pm - 10:14 pmEYW-ONT

9h 25m1 stop

$719American Airlines

Find Deal

Mon, Dec 8 - Thu, Jan 1

6:00 am - 9:50 pmONT-EYW

12h 50m2 stops

3:49 pm - 10:14 pmEYW-ONT

9h 25m1 stop

$725American Airlines

Find Deal

Sat, Dec 6 - Thu, Jan 1

1:34 pm - 3:24 pmONT-EYW

22h 50m2 stops

4:08 pm - 10:25 pmEYW-ONT

9h 17m1 stop

$730United Airlines

Find Deal

Mon, Dec 8 - Thu, Jan 1

6:00 am - 9:50 pmONT-EYW

12h 50m2 stops

8:00 am - 11:46 pmEYW-ONT

18h 46m2 stops

$821American Airlines

Find Deal

Sat, Dec 6 - Thu, Jan 1

7:00 am - 7:35 pmONT-EYW

9h 35m2 stops

3:49 pm - 10:14 pmEYW-ONT

9h 25m1 stop

$864American Airlines

Find Deal

Wed, Dec 10 - Thu, Jan 1

6:17 am - 11:02 amONT-EYW

25h 45m2 stops

8:00 am - 11:46 pmEYW-ONT

18h 46m2 stops

$946American Airlines

Find Deal

Mon, Dec 8 - Thu, Jan 1

American Airlines flights from Ontario to Key West

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

American Airlines

Dec 6

ONT10:34 pmOntario

10h 31m

1 stop

EYW12:05 pmKey West

Dec 13

EYW2:36 pmKey West

9h 31m

1 stop

ONT9:07 pmOntario

$408

Find similar

American Airlines

Dec 8

ONT6:00 amOntario

7h 07m

1 stop

EYW4:07 pmKey West

Jan 1

EYW3:49 pmKey West

9h 25m

1 stop

ONT10:14 pmOntario

$719

Find similar

American Airlines

Dec 6

ONT6:00 amOntario

12h 50m

2 stops

EYW9:50 pmKey West

Jan 1

EYW3:49 pmKey West

9h 25m

1 stop

ONT10:14 pmOntario

$725

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 3

ONT6:04 amOntario

6h 44m

1 stop

EYW3:48 pmKey West

Jan 8

EYW4:15 pmKey West

31h 43m

2 stops

ONT8:58 pmOntario

$572

Find similar

United Airlines

Dec 8

ONT1:34 pmOntario

22h 50m

2 stops

EYW3:24 pmKey West

Jan 1

EYW4:08 pmKey West

9h 17m

1 stop

ONT10:25 pmOntario

$730

Find similar

United Airlines

Dec 21

ONT11:59 pmOntario

9h 35m

1 stop

EYW12:34 pmKey West

Dec 22

EYW4:10 pmKey West

9h 15m

1 stop

ONT10:25 pmOntario

$955

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 12/6

10:34 pm-12:05 pm

1 stop10h 31m

Key West

Sat 12/13

2:36 pm-9:07 pm

1 stop9h 31m

$408

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 1/3

6:04 am-3:48 pm

1 stop6h 44m

Key West

Thu 1/8

4:15 pm-8:58 pm

2 stops31h 43m

$572

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sun 12/7

7:05 am-5:15 pm

1 stop7h 10m

Key West

Thu 1/1

7:25 am-7:50 pm

1 stop15h 25m

$597

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 12/6

7:05 am-8:06 pm

1 stop10h 01m

Key West

Thu 1/1

7:25 am-7:50 pm

1 stop15h 25m

$667

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 12/8

6:00 am-4:07 pm

1 stop7h 07m

Key West

Thu 1/1

3:49 pm-10:14 pm

1 stop9h 25m

$719

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 12/6

6:00 am-9:50 pm

2 stops12h 50m

Key West

Thu 1/1

3:49 pm-10:14 pm

1 stop9h 25m

$725

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 12/8

1:34 pm-3:24 pm

2 stops22h 50m

Key West

Thu 1/1

4:08 pm-10:25 pm

1 stop9h 17m

$730

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 12/6

6:00 am-9:50 pm

2 stops12h 50m

Key West

Thu 1/1

8:00 am-11:46 pm

2 stops18h 46m

$821

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 12/10

7:00 am-7:35 pm

2 stops9h 35m

Key West

Thu 1/1

3:49 pm-10:14 pm

1 stop9h 25m

$864

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 12/8

6:17 am-11:02 am

2 stops25h 45m

Key West

Thu 1/1

8:00 am-11:46 pm

2 stops18h 46m

$946

Flights are sorted by cheapest round-trip flights first.

Sorted 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 6h 44m 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 November 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 11,034 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.