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Cheap flights from Key West to Puerto Rico from $182

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Key West to Puerto Rico departing on 12/5. 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 Key West to Puerto Rico

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:53 pm - 10:07 amEYW-SJU
13h 14m1 stop
American Airlines Logo
3:10 pm - 9:46 pmSJU-EYW
7h 36m1 stop
$365American Airlines
Find Deal
Tue, Dec 2 - Wed, Dec 10
American Airlines Logo
6:33 pm - 10:17 amEYW-SJU
14h 44m2 stops
American Airlines Logo
11:00 am - 7:23 pmSJU-EYW
9h 23m1 stop
$385American Airlines
Find Deal
Wed, Nov 12 - Fri, Nov 21
Multiple Airlines Logo
11:45 am - 8:27 pmEYW-SJU
31h 42m2 stops
Multiple Airlines Logo
12:10 pm - 3:44 pmSJU-EYW
28h 34m1 stop
$388Multiple Airlines
Find Deal
Tue, Dec 2 - Wed, Dec 10
Multiple Airlines Logo
8:55 am - 2:30 amEYW-SJU
17h 35m1 stop
Multiple Airlines Logo
9:00 am - 11:05 amSJU-EYW
26h 05m2 stops
$434Multiple Airlines
Find Deal
Thu, Oct 16 - Mon, Oct 20
American Airlines Logo
7:45 pm - 10:48 amEYW-SJU
14h 03m1 stop
American Airlines Logo
10:26 am - 4:37 pmSJU-EYW
7h 11m1 stop
$455American Airlines
Find Deal
Sun, Feb 1 - Sun, Feb 15
Multiple Airlines Logo
9:46 am - 2:50 amEYW-SJU
16h 04m1 stop
Multiple Airlines Logo
3:55 am - 9:06 amSJU-EYW
6h 11m1 stop
$495Multiple Airlines
Find Deal
Sun, Feb 1 - Sat, Feb 14
Spirit Airlines Logo
2:25 pm - 4:23 pmEYW-SJU
24h 58m2 stops
Spirit Airlines Logo
8:28 pm - 1:30 pmSJU-EYW
18h 02m2 stops
$648Spirit Airlines
Find Deal
Sun, Feb 1 - Sun, Feb 15
Spirit Airlines Logo
2:25 pm - 7:21 pmEYW-SJU
27h 56m3 stops
Spirit Airlines Logo
8:28 pm - 1:30 pmSJU-EYW
18h 02m2 stops
$683Spirit Airlines
Find Deal
Sun, Feb 1 - Sun, Feb 15
United Airlines Logo
3:00 pm - 12:36 amEYW-SJU
8h 36m1 stop
United Airlines Logo
5:50 pm - 1:46 pmSJU-EYW
44h 56m3 stops
$958United Airlines
Find Deal
Wed, Nov 12 - Fri, Nov 21
United Airlines Logo
3:00 pm - 10:22 pmEYW-SJU
30h 22m2 stops
United Airlines Logo
5:50 pm - 1:46 pmSJU-EYW
44h 56m3 stops
$1,009United Airlines
Find Deal
Wed, Nov 12 - Fri, Nov 21

American Airlines flights from Key West to Puerto Rico

Our best American Airlines deals on Key West to Puerto Rico flight tickets
American Airlines
Dec 2
EYW7:53 pmKey West
13h 14m
1 stop
SJU10:07 amSan Juan Luis Munoz Marin Intl
Dec 10
SJU3:10 pmSan Juan Luis Munoz Marin Intl
7h 36m
1 stop
EYW9:46 pmKey West
$365
Find similar
American Airlines
Nov 12
EYW6:33 pmKey West
14h 44m
2 stops
SJU10:17 amSan Juan Luis Munoz Marin Intl
Nov 21
SJU11:00 amSan Juan Luis Munoz Marin Intl
9h 23m
1 stop
EYW7:23 pmKey West
$385
Find similar
American Airlines
Feb 1
EYW7:45 pmKey West
14h 03m
1 stop
SJU10:48 amSan Juan Luis Munoz Marin Intl
Feb 15
SJU10:26 amSan Juan Luis Munoz Marin Intl
7h 11m
1 stop
EYW4:37 pmKey West
$455
Find similar

Spirit Airlines flights from Key West to Puerto Rico

Our best Spirit Airlines deals on Key West to Puerto Rico flight tickets
Spirit Airlines
Feb 1
EYW2:25 pmKey West
24h 58m
2 stops
SJU4:23 pmSan Juan Luis Munoz Marin Intl
Feb 15
SJU8:28 pmSan Juan Luis Munoz Marin Intl
18h 02m
2 stops
EYW1:30 pmKey West
$648
Find similar
Spirit Airlines
Feb 1
EYW2:25 pmKey West
27h 56m
3 stops
SJU7:21 pmSan Juan Luis Munoz Marin Intl
Feb 15
SJU8:28 pmSan Juan Luis Munoz Marin Intl
18h 02m
2 stops
EYW1:30 pmKey West
$683
Find similar
Spirit Airlines
Feb 1
EYW2:25 pmKey West
27h 56m
3 stops
SJU7:21 pmSan Juan Luis Munoz Marin Intl
Feb 15
SJU7:00 amSan Juan Luis Munoz Marin Intl
31h 30m
3 stops
EYW1:30 pmKey West
$788
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Key West to Puerto Rico 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 October 2, 2025.
Use the filters below to find and compare flights from Key West to Puerto Rico that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Tue 12/2

7:53 pm-10:07 am

1 stop13h 14m

San Juan Luis Munoz Marin Intl

Wed 12/10

3:10 pm-9:46 pm

1 stop7h 36m

$365

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 11/12

6:33 pm-10:17 am

2 stops14h 44m

San Juan Luis Munoz Marin Intl

Fri 11/21

11:00 am-7:23 pm

1 stop9h 23m

$385

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Tue 12/2

11:45 am-8:27 pm

2 stops31h 42m

San Juan Luis Munoz Marin Intl

Wed 12/10

12:10 pm-3:44 pm

1 stop28h 34m

$388

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 10/16

8:55 am-2:30 am

1 stop17h 35m

San Juan Luis Munoz Marin Intl

Mon 10/20

9:00 am-11:05 am

2 stops26h 05m

$434

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sun 2/1

7:45 pm-10:48 am

1 stop14h 03m

San Juan Luis Munoz Marin Intl

Sun 2/15

10:26 am-4:37 pm

1 stop7h 11m

$455

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sun 2/1

9:46 am-2:50 am

1 stop16h 04m

San Juan Luis Munoz Marin Intl

Sat 2/14

3:55 am-9:06 am

1 stop6h 11m

$495

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sun 2/1

2:25 pm-4:23 pm

2 stops24h 58m

San Juan Luis Munoz Marin Intl

Sun 2/15

8:28 pm-1:30 pm

2 stops18h 02m

$648

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sun 2/1

2:25 pm-7:21 pm

3 stops27h 56m

San Juan Luis Munoz Marin Intl

Sun 2/15

8:28 pm-1:30 pm

2 stops18h 02m

$683

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 11/12

3:00 pm-12:36 am

1 stop8h 36m

San Juan Luis Munoz Marin Intl

Fri 11/21

5:50 pm-1:46 pm

3 stops44h 56m

$958

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 11/12

3:00 pm-10:22 pm

2 stops30h 22m

San Juan Luis Munoz Marin Intl

Fri 11/21

5:50 pm-1:46 pm

3 stops44h 56m

$1,009

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Puerto Rico from

How to get the cheapest flight ticket from Key West to Puerto Rico

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 time of day to depart on your flight to Puerto Rico?

Our most recent data shows that the best time of day to fly to Puerto Rico is in the morning. Flights from Key West to Puerto Rico during this time can be as low as $404. In contrast, the most expensive time of day to depart to Puerto Rico is in the afternoon when prices are around $448.

Cheap Key West to Puerto Rico flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Key West to Puerto Rico

Direct flights

None
There are no direct flights from Key West to Puerto Rico. There are no popular flight routes from Key West to Puerto Rico.
Search flight deals

  • When did momondo last update prices for flights from Key West Airport to Puerto Rico?

    Prices for flights from Key West Airport to Puerto Rico refresh daily.

  • How many operators does momondo search for flights from Key West Airport to Puerto Rico?

  • How old do you have to be to fly from Key West Airport to Puerto Rico?

    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 Key West Airport to Puerto Rico.

  • What documentation or ID do you need to fly to Puerto Rico?

    The travel and health documents required for your trip to Puerto Rico 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 Puerto Rico. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Key West to Puerto Rico

Compare and see reviews for airlines that fly from Key West to Puerto Rico with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $360Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Key West to Puerto Rico?

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 Puerto Rico from Key West.

Can I find flights from Key West to Puerto Rico with flexible booking policies on momondo?

All flight searches from Key West to Puerto Rico on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Key West to Puerto Rico?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Key West to Puerto Rico.

I’m not ready to book a flight from Key West to Puerto Rico right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Key West to Puerto Rico now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Puerto Rico and let you know when they change.

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Find better results for your trip to Puerto Rico

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