What is the cheapest airline that flies from Ontario to Florida Keys?

Southwest, Delta, and United Airlines are the most popular carriers operating from Ontario to Florida Keys

When did momondo last update prices for flights from Ontario Airport to Florida Keys?

Prices for flights from Ontario Airport to Florida Keys refresh daily.

How many operators does momondo search for flights from Ontario Airport to Florida Keys?

As of June 2026, there are 6 operators available to choose from for flights from Ontario Airport to Florida Keys.

How old do you have to be to fly from Ontario Airport to Florida Keys?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Florida Keys.

What documentation or ID do you need to fly to Florida Keys?

The required travel and health documents for your Florida Keys trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Florida Keys. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$124 Cheap Flights from Ontario to Florida Keys in 2026

Find the cheapest flights from Ontario to Florida Keys

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:36 am - 12:21 am

ONT

MIA

11h 45m

1 stop

6:00 am - 11:50 pm

MIA

ONT

20h 50m

1 stop

$241Frontier

Thu, Aug 6 - Wed, Aug 12

9:36 am - 12:21 am

ONT

MIA

11h 45m

1 stop

9:35 am - 5:52 pm

MIA

ONT

11h 17m

1 stop

$245Frontier

Fri, Aug 7 - Mon, Aug 24

9:36 am - 12:21 am

ONT

MIA

11h 45m

1 stop

6:00 am - 4:48 pm

MIA

ONT

13h 48m

1 stop

$248Frontier

Sat, Aug 15 - Sat, Aug 22

5:05 pm - 10:58 am

ONT

EYW

14h 53m

2 stops

7:00 am - 4:12 pm

EYW

ONT

12h 12m

2 stops

$454Delta

Sat, Nov 7 - Thu, Nov 12

5:34 am - 4:54 pm

ONT

EYW

8h 20m

1 stop

4:41 pm - 10:34 pm

EYW

ONT

8h 53m

1 stop

$456American Airlines

Sat, Jul 4 - Fri, Jul 10

10:59 pm - 10:58 am

ONT

EYW

8h 59m

1 stop

7:00 am - 4:12 pm

EYW

ONT

12h 12m

2 stops

$480Delta

Fri, Nov 6 - Thu, Nov 12

5:05 pm - 10:58 am

ONT

EYW

14h 53m

2 stops

2:35 pm - 10:14 pm

EYW

ONT

10h 39m

1 stop

$495Delta

Sat, Nov 7 - Wed, Nov 11

6:10 am - 4:29 pm

ONT

EYW

7h 19m

1 stop

2:50 pm - 9:11 pm

EYW

ONT

9h 21m

1 stop

$497American Airlines

Sat, Nov 7 - Sat, Nov 14

6:10 am - 4:29 pm

ONT

EYW

7h 19m

1 stop

4:26 pm - 11:57 pm

EYW

ONT

10h 31m

2 stops

$502American Airlines

Sat, Nov 7 - Sat, Nov 14

5:34 am - 4:54 pm

ONT

EYW

8h 20m

1 stop

4:41 pm - 10:34 pm

EYW

ONT

8h 53m

1 stop

$512American Airlines

Sat, Jul 4 - Fri, Jul 10

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Frontier flights from Ontario to Florida Keys

Our best Frontier deals on Ontario to Florida Keys flight tickets

Frontier

Aug 6

ONT9:36 amOntario

11h 45m

1 stop

MIA12:21 amMiami

Aug 12

MIA6:00 amMiami

20h 50m

1 stop

ONT11:50 pmOntario

$241

Frontier

Aug 7

ONT9:36 amOntario

11h 45m

1 stop

MIA12:21 amMiami

Aug 24

MIA9:35 amMiami

11h 17m

1 stop

ONT5:52 pmOntario

$245

Frontier

Aug 15

ONT9:36 amOntario

11h 45m

1 stop

MIA12:21 amMiami

Aug 22

MIA6:00 amMiami

13h 48m

1 stop

ONT4:48 pmOntario

$248

United Airlines flights from Ontario to Florida Keys

Our best United Airlines deals on Ontario to Florida Keys flight tickets

United Airlines

Nov 14

ONT6:02 amOntario

9h 03m

1 stop

MIA6:05 pmMiami

Nov 17

MIA11:25 amMiami

11h 55m

2 stops

ONT8:20 pmOntario

$293

United Airlines

Nov 10

ONT1:33 pmOntario

22h 33m

2 stops

EYW3:06 pmKey West

Nov 17

EYW4:05 pmKey West

9h 21m

1 stop

ONT10:26 pmOntario

$545

United Airlines

Nov 9

ONT1:33 pmOntario

22h 33m

2 stops

EYW3:06 pmKey West

Nov 17

EYW4:05 pmKey West

9h 21m

1 stop

ONT10:26 pmOntario

$584

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Thu 8/6

9:36 am-12:21 am

1 stop11h 45m

Miami

Wed 8/12

6:00 am-11:50 pm

1 stop20h 50m

$241

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 8/7

9:36 am-12:21 am

1 stop11h 45m

Miami

Mon 8/24

9:35 am-5:52 pm

1 stop11h 17m

$245

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 8/15

9:36 am-12:21 am

1 stop11h 45m

Miami

Sat 8/22

6:00 am-4:48 pm

1 stop13h 48m

$248

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 11/7

5:05 pm-10:58 am

2 stops14h 53m

Key West

Thu 11/12

7:00 am-4:12 pm

2 stops12h 12m

$454

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 7/4

5:34 am-4:54 pm

1 stop8h 20m

Key West

Fri 7/10

4:41 pm-10:34 pm

1 stop8h 53m

$456

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Fri 11/6

10:59 pm-10:58 am

1 stop8h 59m

Key West

Thu 11/12

7:00 am-4:12 pm

2 stops12h 12m

$480

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 11/7

5:05 pm-10:58 am

2 stops14h 53m

Key West

Wed 11/11

2:35 pm-10:14 pm

1 stop10h 39m

$495

Quickest round-trip

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 11/7

6:10 am-4:29 pm

1 stop7h 19m

Key West

Sat 11/14

2:50 pm-9:11 pm

1 stop9h 21m

$497

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 11/7

6:10 am-4:29 pm

1 stop7h 19m

Key West

Sat 11/14

4:26 pm-11:57 pm

2 stops10h 31m

$502

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 7/4

5:34 am-4:54 pm

1 stop8h 20m

Key West

Fri 7/10

4:41 pm-10:34 pm

1 stop8h 53m

$512

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Florida Keys

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 month to fly to Florida Keys?

The month of April is another great option to travel to Florida Keys, with average flight prices from Ontario averaging around $123.

How far in advance should I book a flight from Ontario to Florida Keys?

You are more likely to see cheaper flights to Florida Keys from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Florida Keys for around $403 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Florida Keys from Ontario for as low as $336 on momondo.

Can stopping save me money on Ontario to Florida Keys flights?

No. A direct flight is the cheapest option for a flight between Ontario to Florida Keys.

Cheap Ontario to Florida Keys flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Florida Keys

Fastest flight time	7h 02m
Direct flights	None

The fastest flight from Ontario to Florida Keys takes 7h 02m

There are no direct flights from Ontario to Florida Keys. There are no popular flight routes from Ontario to Florida Keys.

Search flight deals

Frequently asked questions about flying from Ontario to Florida Keys

When did momondo last update prices for flights from Ontario Airport to Florida Keys?
Prices for flights from Ontario Airport to Florida Keys refresh daily.
How many operators does momondo search for flights from Ontario Airport to Florida Keys?
As of June 2026, there are 6 operators available to choose from for flights from Ontario Airport to Florida Keys.
How old do you have to be to fly from Ontario Airport to Florida Keys?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Florida Keys.
What documentation or ID do you need to fly to Florida Keys?
The required travel and health documents for your Florida Keys trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Florida Keys. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Ontario to Florida Keys?
Based on momondo bookings for flights between Ontario and Florida Keys, the leading plane model is Airbus A321neo, making up 14.03% of the total bookings. Other popular models include Airbus A321-100/200 with 12.85%, Airbus A320neo with 12.81%, and Boeing 737 MAX 8 with 12.31%.

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Florida Keys?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Florida Keys. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Florida Keys with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Florida Keys from Ontario with this policy.

How can momondo help me find flights from Ontario to Florida Keys?

momondo provides multiple filters to help you find the best flight to Florida Keys from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Ontario to Florida Keys flights. All you need is a valid email address and we will do the rest; it is that quick and easy.