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Cheap flights from Ontario to Florida Keys from $60

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Florida Keys departing on 2/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Florida Keys

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
Frontier Logo
6:25 am - 11:59 pm
MIA
-
ONT
20h 34m
1 stop
$164Frontier
Sa, Feb 21 - Sa, Feb 28
Frontier Logo
8:40 am - 12:42 am
ONT
-
MIA
13h 02m
2 stops
Frontier Logo
5:50 am - 11:59 pm
MIA
-
ONT
21h 09m
1 stop
$171Frontier
Di, Mrz 3 - Di, Mrz 10
Frontier Logo
8:35 am - 5:48 am
ONT
-
MIA
18h 13m
1 stop
Frontier Logo
6:45 am - 11:59 pm
MIA
-
ONT
20h 14m
1 stop
$175Frontier
Di, Feb 24 - Do, Feb 26
Frontier Logo
7:29 pm - 7:32 am
ONT
-
MIA
9h 03m
1 stop
Frontier Logo
11:34 am - 4:38 pm
MIA
-
ONT
8h 04m
1 stop
$180Frontier
Di, Apr 21 - Mo, Apr 27
Frontier Logo
8:40 am - 5:14 am
ONT
-
MIA
17h 34m
1 stop
Frontier Logo
5:50 am - 11:59 pm
MIA
-
ONT
21h 09m
1 stop
$183Frontier
Mi, Mrz 4 - Di, Mrz 10
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
Frontier Logo
6:25 am - 11:59 pm
MIA
-
ONT
20h 34m
1 stop
$185Frontier
Sa, Feb 21 - Mo, Feb 23
Frontier Logo
7:15 am - 5:12 pm
ONT
-
MIA
6h 57m
1 stop
Frontier Logo
6:25 am - 11:59 pm
MIA
-
ONT
20h 34m
1 stop
$186Frontier
Sa, Feb 7 - Sa, Feb 14
Frontier Logo
8:36 am - 5:48 am
ONT
-
MIA
18h 12m
1 stop
Frontier Logo
6:25 am - 11:59 pm
MIA
-
ONT
20h 34m
1 stop
$191Frontier
Di, Feb 10 - Sa, Feb 14
American Airlines Logo
6:00 am - 4:18 pm
ONT
-
EYW
7h 18m
1 stop
American Airlines Logo
2:40 pm - 10:07 pm
EYW
-
ONT
10h 27m
2 stops
$359American Airlines
Di, Mrz 10 - Di, Mrz 17
American Airlines Logo
11:58 pm - 3:57 pm
ONT
-
EYW
12h 59m
2 stops
American Airlines Logo
2:40 pm - 10:07 pm
EYW
-
ONT
10h 27m
2 stops
$365American Airlines
Di, Mrz 10 - Di, Mrz 17

Frontier flights from Ontario to Florida Keys

Our best Frontier deals on Ontario to Florida Keys flight tickets
Frontier
Feb 24
ONT8:35 amOntario
18h 13m
1 stop
MIA5:48 amMiami
Mar 3
MIA6:25 amMiami
18h 09m
1 stop
ONT9:34 pmOntario
$158
Frontier
Feb 21
ONT6:00 amOntario
20h 14m
1 stop
MIA5:14 amMiami
Feb 28
MIA6:25 amMiami
20h 34m
1 stop
ONT11:59 pmOntario
$164
Frontier
Feb 24
ONT8:35 amOntario
18h 13m
1 stop
MIA5:48 amMiami
Feb 26
MIA6:45 amMiami
20h 14m
1 stop
ONT11:59 pmOntario
$169

Southwest flights from Ontario to Florida Keys

Our best Southwest deals on Ontario to Florida Keys flight tickets
Southwest
Jan 31
ONT5:40 amOntario
6h 55m
1 stop
MIA3:35 pmMiami
Feb 14
MIA8:00 amMiami
10h 45m
1 stop
ONT3:45 pmOntario
$367
Southwest
Jan 31
ONT5:50 amOntario
7h 35m
2 stops
MIA4:25 pmMiami
Feb 10
MIA9:00 amMiami
9h 40m
1 stop
ONT3:40 pmOntario
$372
Southwest
Feb 5
ONT8:10 amOntario
11h 05m
2 stops
MIA10:15 pmMiami
Feb 9
MIA7:55 amMiami
12h 40m
1 stop
ONT5:35 pmOntario
$373

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Florida Keys that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated Jänner 25, 2026.
Use the filters below to find and compare flights from Ontario to Florida Keys that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sa 2/21

6:00 am-5:14 am

1 stop20h 14m

Miami

Sa 2/28

6:25 am-11:59 pm

1 stop20h 34m

$164

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Di 3/3

8:40 am-12:42 am

2 stops13h 02m

Miami

Di 3/10

5:50 am-11:59 pm

1 stop21h 09m

$171

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Di 2/24

8:35 am-5:48 am

1 stop18h 13m

Miami

Do 2/26

6:45 am-11:59 pm

1 stop20h 14m

$175

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Di 4/21

7:29 pm-7:32 am

1 stop9h 03m

Miami

Mo 4/27

11:34 am-4:38 pm

1 stop8h 04m

$180

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mi 3/4

8:40 am-5:14 am

1 stop17h 34m

Miami

Di 3/10

5:50 am-11:59 pm

1 stop21h 09m

$183

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sa 2/21

6:00 am-5:14 am

1 stop20h 14m

Miami

Mo 2/23

6:25 am-11:59 pm

1 stop20h 34m

$185

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sa 2/7

7:15 am-5:12 pm

1 stop6h 57m

Miami

Sa 2/14

6:25 am-11:59 pm

1 stop20h 34m

$186

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Di 2/10

8:36 am-5:48 am

1 stop18h 12m

Miami

Sa 2/14

6:25 am-11:59 pm

1 stop20h 34m

$191

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Di 3/10

6:00 am-4:18 pm

1 stop7h 18m

Key West

Di 3/17

2:40 pm-10:07 pm

2 stops10h 27m

$359

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Di 3/10

11:58 pm-3:57 pm

2 stops12h 59m

Key West

Di 3/17

2:40 pm-10:07 pm

2 stops10h 27m

$365

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Florida Keys from

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

What is the cheapest month to fly to Florida Keys?

The month of August is another great option to travel to Florida Keys, with average flight prices from Ontario averaging around $356.

How far in advance should I book a flight 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 $408 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 $352 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

6h 23m

Direct flights

None
The fastest flight from Ontario to Florida Keys takes 6h 23m
There are no direct flights from Ontario to Florida Keys. There are no popular flight routes from Ontario to Florida Keys.
Search flight deals

  • 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?

  • 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?

Best airlines flying from Ontario to Florida Keys

Compare and see reviews for airlines that fly from Ontario to Florida Keys with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $314Free CancellationRating
7.2
11,197 reviews
Search American Airlines flights

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.

An easier way to manage your Florida Keys trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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1 adult
Di 2/24
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Find better results for your trip to Florida Keys

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Popular flights according to clicks in the last 7 days on momondo
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