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 80% 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?

United Airlines is the most popular carrier 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 August 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

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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 - 7:11 pmEYW-ONT

8h 11m1 stop

$309Delta

Find Deal

Sat, Aug 23 - Tue, Aug 26

6:10 am - 6:59 pmONT-EYW

9h 49m2 stops

11:25 am - 9:24 pmEYW-ONT

12h 59m2 stops

$319American Airlines

Find Deal

Wed, Sep 17 - Wed, Sep 24

7:05 am - 8:12 pmONT-EYW

10h 07m1 stop

2:00 pm - 7:11 pmEYW-ONT

8h 11m1 stop

$369Delta

Find Deal

Sat, Aug 16 - Wed, Aug 20

7:05 am - 8:12 pmONT-EYW

10h 07m1 stop

2:00 pm - 10:40 pmEYW-ONT

11h 40m2 stops

$374Delta

Find Deal

Sat, Aug 23 - Tue, Aug 26

11:59 pm - 2:05 pmONT-EYW

11h 06m2 stops

1:52 pm - 10:48 pmEYW-ONT

11h 56m2 stops

$379American Airlines

Find Deal

Sat, Aug 16 - Wed, Aug 20

6:10 am - 6:59 pmONT-EYW

9h 49m2 stops

11:25 am - 9:24 pmEYW-ONT

12h 59m2 stops

$384American Airlines

Find Deal

Wed, Sep 17 - Wed, Sep 24

7:05 am - 5:15 pmONT-EYW

7h 10m1 stop

2:00 pm - 7:15 pmEYW-ONT

8h 15m1 stop

$388Delta

Find Deal

Wed, Sep 17 - Wed, Sep 24

1:29 pm - 4:19 pmONT-EYW

23h 50m2 stops

4:00 pm - 10:31 pmEYW-ONT

9h 31m1 stop

$517United Airlines

Find Deal

Sat, Nov 1 - Wed, Nov 5

7:00 am - 4:19 pmONT-EYW

30h 19m1 stop

4:00 pm - 10:31 pmEYW-ONT

9h 31m1 stop

$587United Airlines

Find Deal

Sat, Nov 1 - Wed, Nov 5

1:42 pm - 2:01 pmONT-EYW

21h 19m2 stops

3:50 pm - 12:32 pmEYW-ONT

23h 42m2 stops

$780United Airlines

Find Deal

Thu, Sep 11 - Mon, Sep 15

American Airlines flights from Ontario to Key West

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

American Airlines

Sep 17

ONT6:10 amOntario

9h 49m

2 stops

EYW6:59 pmKey West

Sep 24

EYW11:25 amKey West

12h 59m

2 stops

ONT9:24 pmOntario

$319

Find similar

American Airlines

Aug 16

ONT10:29 pmOntario

10h 29m

1 stop

EYW11:58 amKey West

Aug 20

EYW1:52 pmKey West

11h 56m

2 stops

ONT10:48 pmOntario

$374

Find similar

American Airlines

Aug 16

ONT11:59 pmOntario

11h 06m

2 stops

EYW2:05 pmKey West

Aug 20

EYW1:52 pmKey West

11h 56m

2 stops

ONT10:48 pmOntario

$379

Find similar

United Airlines flights from Ontario to Key West

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

United Airlines

Nov 1

ONT1:29 pmOntario

23h 50m

2 stops

EYW4:19 pmKey West

Nov 5

EYW4:00 pmKey West

9h 31m

1 stop

ONT10:31 pmOntario

$517

Find similar

United Airlines

Nov 1

ONT7:00 amOntario

30h 19m

1 stop

EYW4:19 pmKey West

Nov 5

EYW4:00 pmKey West

9h 31m

1 stop

ONT10:31 pmOntario

$587

Find similar

United Airlines

Sep 11

ONT1:42 pmOntario

21h 19m

2 stops

EYW2:01 pmKey West

Sep 15

EYW3:50 pmKey West

23h 42m

2 stops

ONT12:32 pmOntario

$780

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 8/23

7:05 am-5:12 pm

1 stop7h 07m

Key West

Tue 8/26

2:00 pm-7:11 pm

1 stop8h 11m

$309

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 9/17

6:10 am-6:59 pm

2 stops9h 49m

Key West

Wed 9/24

11:25 am-9:24 pm

2 stops12h 59m

$319

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 8/16

7:05 am-8:12 pm

1 stop10h 07m

Key West

Wed 8/20

2:00 pm-7:11 pm

1 stop8h 11m

$369

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 8/23

7:05 am-8:12 pm

1 stop10h 07m

Key West

Tue 8/26

2:00 pm-10:40 pm

2 stops11h 40m

$374

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 8/16

11:59 pm-2:05 pm

2 stops11h 06m

Key West

Wed 8/20

1:52 pm-10:48 pm

2 stops11h 56m

$379

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 9/17

6:10 am-6:59 pm

2 stops9h 49m

Key West

Wed 9/24

11:25 am-9:24 pm

2 stops12h 59m

$384

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 9/17

7:05 am-5:15 pm

1 stop7h 10m

Key West

Wed 9/24

2:00 pm-7:15 pm

1 stop8h 15m

$388

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 11/1

1:29 pm-4:19 pm

2 stops23h 50m

Key West

Wed 11/5

4:00 pm-10:31 pm

1 stop9h 31m

$517

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 11/1

7:00 am-4:19 pm

1 stop30h 19m

Key West

Wed 11/5

4:00 pm-10:31 pm

1 stop9h 31m

$587

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Thu 9/11

1:42 pm-2:01 pm

2 stops21h 19m

Key West

Mon 9/15

3:50 pm-12:32 pm

2 stops23h 42m

$780

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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

Best Price Found	$604
Fastest flight time	7h 07m
Direct flights	None
Airports in Key West	1 airport

The best one-way flight to Key West from Ontario in the past 72 hours is $604. The best round-trip flight deal from Ontario to Key West found on momondo in the last 72 hours is $309.

The fastest flight from Ontario to Key West takes 7h 07m

There are no direct flights from Ontario to Key West. Popular non-direct route for this connection is Ontario Airport - Key West Airport.

There is 1 airport near Key West: Key West (EYW)

Search flight deals

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 07m 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 August 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 $318	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.