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Cheap flights from Key West to Costa Rica from $339

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Key West to Costa Rica departing on 1/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Spirit Airlines Logo
12:51 pm - 12:22 pm
EYW
-
SJO
24h 31m1 stop
Spirit Airlines Logo
1:30 pm - 1:30 pm
SJO
-
EYW
23h 00m1 stop
$339Spirit Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
12:51 pm - 12:22 pm
EYW
-
SJO
24h 31m1 stop
Multiple Airlines Logo
1:30 pm - 9:09 am
SJO
-
EYW
18h 39m2 stops
$350Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
12:51 pm - 3:20 pm
EYW
-
SJO
27h 29m3 stops
Multiple Airlines Logo
12:33 pm - 1:30 pm
SJO
-
EYW
23h 57m3 stops
$461Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
2:45 pm - 12:22 pm
EYW
-
SJO
22h 37m2 stops
Multiple Airlines Logo
12:33 pm - 1:30 pm
SJO
-
EYW
23h 57m3 stops
$466Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
2:45 pm - 12:22 pm
EYW
-
SJO
22h 37m2 stops
Multiple Airlines Logo
1:30 pm - 11:15 am
SJO
-
EYW
20h 45m2 stops
$477Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Delta Logo
7:10 am - 10:15 pm
EYW
-
SJO
16h 05m1 stop
Delta Logo
7:00 am - 5:11 pm
SJO
-
EYW
9h 11m1 stop
$485Delta
Wed, Jan 21 - Mon, Jan 26
Delta Logo
7:10 am - 10:15 pm
EYW
-
SJO
16h 05m1 stop
Delta Logo
7:00 am - 5:11 pm
SJO
-
EYW
9h 11m1 stop
$495Delta
Wed, Jan 21 - Mon, Jan 26
American Airlines Logo
7:08 am - 7:44 pm
EYW
-
SJO
13h 36m2 stops
American Airlines Logo
6:00 am - 9:47 pm
SJO
-
EYW
14h 47m2 stops
$516American Airlines
Wed, Jan 21 - Mon, Jan 26
Multiple Airlines Logo
3:24 pm - 11:42 am
EYW
-
SJO
21h 18m1 stop
Multiple Airlines Logo
2:57 pm - 1:30 pm
SJO
-
EYW
21h 33m2 stops
$556Multiple Airlines
Sun, Dec 21 - Fri, Dec 26
Multiple Airlines Logo
3:15 pm - 12:25 pm
EYW
-
SJO
22h 10m2 stops
Multiple Airlines Logo
1:31 pm - 1:30 pm
SJO
-
EYW
22h 59m1 stop
$578Multiple Airlines
Tue, Dec 23 - Fri, Dec 26

American Airlines flights from Key West to Costa Rica

Our best American Airlines deals on Key West to Costa Rica flight tickets
American Airlines
Jan 21
EYW7:08 amKey West
13h 36m
2 stops
SJO7:44 pmSan José Juan Santamaria Intl
Jan 26
SJO8:00 amSan José Juan Santamaria Intl
10h 10m
1 stop
EYW7:10 pmKey West
$516
Find similar
American Airlines
Dec 23
EYW1:46 pmKey West
23h 47m
1 stop
SJO12:33 pmSan José Juan Santamaria Intl
Dec 29
SJO1:31 pmSan José Juan Santamaria Intl
8h 13m
1 stop
EYW10:44 pmKey West
$822
Find similar
American Airlines
Dec 23
EYW4:40 pmKey West
20h 53m
2 stops
SJO12:33 pmSan José Juan Santamaria Intl
Dec 29
SJO1:50 pmSan José Juan Santamaria Intl
21h 18m
2 stops
EYW12:08 pmKey West
$847
Find similar

Delta flights from Key West to Costa Rica

Our best Delta deals on Key West to Costa Rica flight tickets
Delta
Jan 21
EYW7:10 amKey West
16h 05m
1 stop
SJO10:15 pmSan José Juan Santamaria Intl
Jan 26
SJO7:00 amSan José Juan Santamaria Intl
9h 11m
1 stop
EYW5:11 pmKey West
$485
Find similar
Delta
Jan 21
EYW7:10 amKey West
16h 05m
1 stop
SJO10:15 pmSan José Juan Santamaria Intl
Jan 26
SJO7:00 amSan José Juan Santamaria Intl
9h 11m
1 stop
EYW5:11 pmKey West
$495
Find similar
Delta
Dec 21
EYW7:25 amKey West
15h 30m
1 stop
SJO9:55 pmSan José Juan Santamaria Intl
Dec 29
SJO7:00 amSan José Juan Santamaria Intl
12h 58m
1 stop
EYW8:58 pmKey West
$749
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Key West to Costa Rica 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 December 10, 2025.
Use the filters below to find and compare flights from Key West to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Key WestSan José

EYW - SJO

EYWSJO

Key West

Thu 1/22

12:51 pm-12:22 pm

1 stop24h 31m

San José Juan Santamaria Intl

Thu 1/29

1:30 pm-1:30 pm

1 stop23h 00m

$339

Key WestSan José

EYW - SJO

EYWSJO

Key West

Thu 1/22

12:51 pm-12:22 pm

1 stop24h 31m

San José Juan Santamaria Intl

Thu 1/29

1:30 pm-9:09 am

2 stops18h 39m

$350

Key WestSan José

EYW - SJO

EYWSJO

Key West

Thu 1/22

12:51 pm-3:20 pm

3 stops27h 29m

San José Juan Santamaria Intl

Thu 1/29

12:33 pm-1:30 pm

3 stops23h 57m

$461

Key WestSan José

EYW - SJO

EYWSJO

Key West

Thu 1/22

2:45 pm-12:22 pm

2 stops22h 37m

San José Juan Santamaria Intl

Thu 1/29

12:33 pm-1:30 pm

3 stops23h 57m

$466

Key WestSan José

EYW - SJO

EYWSJO

Key West

Thu 1/22

2:45 pm-12:22 pm

2 stops22h 37m

San José Juan Santamaria Intl

Thu 1/29

1:30 pm-11:15 am

2 stops20h 45m

$477

Key WestSan José

EYW - SJO

EYWSJO

Key West

Wed 1/21

7:10 am-10:15 pm

1 stop16h 05m

San José Juan Santamaria Intl

Mon 1/26

7:00 am-5:11 pm

1 stop9h 11m

$485

Key WestSan José

EYW - SJO

EYWSJO

Key West

Wed 1/21

7:10 am-10:15 pm

1 stop16h 05m

San José Juan Santamaria Intl

Mon 1/26

7:00 am-5:11 pm

1 stop9h 11m

$495

Key WestSan José

EYW - SJO

EYWSJO

Key West

Wed 1/21

7:08 am-7:44 pm

2 stops13h 36m

San José Juan Santamaria Intl

Mon 1/26

6:00 am-9:47 pm

2 stops14h 47m

$516

Key WestSan José

EYW - SJO

EYWSJO

Key West

Sun 12/21

3:24 pm-11:42 am

1 stop21h 18m

San José Juan Santamaria Intl

Fri 12/26

2:57 pm-1:30 pm

2 stops21h 33m

$556

Key WestSan José

EYW - SJO

EYWSJO

Key West

Tue 12/23

3:15 pm-12:25 pm

2 stops22h 10m

San José Juan Santamaria Intl

Fri 12/26

1:31 pm-1:30 pm

1 stop22h 59m

$578

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Costa Rica from

How to get the cheapest flight ticket from Key West to Costa Rica

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 day to depart on your flight to Costa Rica?

According to our data, Thursday is the cheapest day to fly to Costa Rica from Key West. The lowest ticket price found for a Thursday departure recently was $554. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $769. These prices are subject to change though, so be sure to set up a Price Alert for flights to Costa Rica.

What is the cheapest time of day to depart on your flight to Costa Rica?

In the afternoon is the cheapest time of day to fly from Key West to Costa Rica when you can find flight prices for as low as $584. Flying to Costa Rica in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Costa Rica are more costly at noon, with an average ticket price of $764. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Cheap Key West to Costa Rica flight deals and tips

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

Fastest flight time

19h 26m

Direct flights

None
The fastest flight from Key West to Costa Rica takes 19h 26m
There are no direct flights from Key West to Costa Rica. There are no popular flight routes from Key West to Costa Rica.
Search flight deals

  • When did momondo last update prices for flights from Key West Airport to Costa Rica?

    Prices for flights from Key West Airport to Costa Rica refresh daily.

  • How old do you have to be to fly from Key West Airport to Costa Rica?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Key West Airport to Costa Rica.

  • What documentation or ID do you need to fly to Costa Rica?

    The travel and health documents you'll need for your trip to Costa Rica may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Costa Rica. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Key West to Costa Rica?

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 Costa Rica from Key West.

Can I find flights from Key West to Costa Rica with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Key West to Costa Rica flights to just show those with flexible booking policies.

How can momondo help me find flights from Key West to Costa Rica?

momondo helps you find the best flight between Key West and Costa Rica by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Costa Rica, momondo offers a useful price alert feature which will track prices for flights to Costa Rica from Key West and alert you when they change.

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