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Cheap flights from Boston to Costa Rica from $135

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Costa Rica departing on 4/29. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Boston to Costa Rica

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
6:00 am - 11:24 am
BOS
-
SJO
7h 24m
1 stop
JetBlue Logo
12:40 pm - 11:56 pm
SJO
-
BOS
9h 16m
1 stop
$295JetBlue
Mon, May 4 - Fri, May 15
Copa Airlines Logo
3:46 pm - 8:20 am
BOS
-
SJO
18h 34m
1 stop
Copa Airlines Logo
5:46 am - 11:09 pm
SJO
-
BOS
15h 23m
1 stop
$306Copa Airlines
Tue, Apr 14 - Tue, Apr 21
Copa Airlines Logo
4:00 pm - 7:12 am
BOS
-
SJO
17h 12m
1 stop
Copa Airlines Logo
10:05 am - 11:08 pm
SJO
-
BOS
11h 03m
1 stop
$308Copa Airlines
Sun, May 31 - Thu, Jun 4
Avianca Logo
4:50 pm - 11:40 pm
BOS
-
SJO
8h 50m
1 stop
Avianca Logo
7:45 pm - 2:50 pm
SJO
-
BOS
17h 05m
1 stop
$309Avianca
Fri, May 1 - Sun, May 17
Copa Airlines Logo
3:46 pm - 9:05 am
BOS
-
SJO
19h 19m
1 stop
Copa Airlines Logo
5:56 pm - 2:31 pm
SJO
-
BOS
18h 35m
1 stop
$310Copa Airlines
Tue, Apr 7 - Mon, Apr 13
Copa Airlines Logo
3:46 pm - 4:47 pm
BOS
-
SJO
27h 01m
3 stops
Copa Airlines Logo
5:47 am - 11:08 pm
SJO
-
BOS
15h 21m
1 stop
$311Copa Airlines
Thu, Apr 30 - Thu, May 7
Copa Airlines Logo
4:00 pm - 7:12 am
BOS
-
SJO
17h 12m
1 stop
Copa Airlines Logo
4:10 am - 11:08 pm
SJO
-
BOS
16h 58m
1 stop
$314Copa Airlines
Tue, May 5 - Sun, May 10
American Airlines Logo
8:45 am - 7:07 pm
BOS
-
SJO
12h 22m
1 stop
American Airlines Logo
12:35 pm - 11:07 pm
SJO
-
BOS
8h 32m
1 stop
$318American Airlines
Wed, May 6 - Thu, May 14
JetBlue Logo
10:36 am - 2:30 pm
BOS
-
LIR
5h 54mnonstop
JetBlue Logo
3:15 pm - 10:38 pm
LIR
-
BOS
5h 23mnonstop
$391JetBlue
Sun, Mar 29 - Mon, Apr 6
Delta Logo
8:20 pm - 12:00 pm
BOS
-
LIR
17h 40m
1 stop
Delta Logo
1:25 pm - 1:03 am
LIR
-
BOS
9h 38m
1 stop
$416Delta
Sun, May 17 - Wed, Jun 10

Copa Airlines flights from Boston to Costa Rica

Our best Copa Airlines deals on Boston to Costa Rica flight tickets
Copa Airlines
Apr 14
BOS3:46 pmBoston Logan Intl
18h 34m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
Apr 21
SJO5:46 amSan José Juan Santamaria Intl
15h 23m
1 stop
BOS11:09 pmBoston Logan Intl
$306
Copa Airlines
May 31
BOS4:00 pmBoston Logan Intl
17h 12m
1 stop
SJO7:12 amSan José Juan Santamaria Intl
Jun 4
SJO10:05 amSan José Juan Santamaria Intl
11h 03m
1 stop
BOS11:08 pmBoston Logan Intl
$308
Copa Airlines
Apr 7
BOS3:46 pmBoston Logan Intl
19h 19m
1 stop
SJO9:05 amSan José Juan Santamaria Intl
Apr 13
SJO5:56 pmSan José Juan Santamaria Intl
18h 35m
1 stop
BOS2:31 pmBoston Logan Intl
$310

JetBlue flights from Boston to Costa Rica

Our best JetBlue deals on Boston to Costa Rica flight tickets
JetBlue
May 4
BOS6:00 amBoston Logan Intl
7h 24m
1 stop
SJO11:24 amSan José Juan Santamaria Intl
May 15
SJO12:40 pmSan José Juan Santamaria Intl
9h 16m
1 stop
BOS11:56 pmBoston Logan Intl
$295
JetBlue
Mar 29
BOS6:20 amBoston Logan Intl
8h 12m
1 stop
SJO12:32 pmSan José Juan Santamaria Intl
Apr 7
SJO1:00 pmSan José Juan Santamaria Intl
9h 17m
1 stop
BOS12:17 amBoston Logan Intl
$315
JetBlue
May 20
BOS2:55 pmBoston Logan Intl
9h 19m
1 stop
SJO10:14 pmSan José Juan Santamaria Intl
May 28
SJO12:40 pmSan José Juan Santamaria Intl
8h 26m
1 stop
BOS11:06 pmBoston Logan Intl
$352

momondo Fare Finder

 
Customize your flight search to find flights from Boston 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 March 15, 2026.
Use the filters below to find and compare flights from Boston to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Mon 5/4

6:00 am-11:24 am

1 stop7h 24m

San José Juan Santamaria Intl

Fri 5/15

12:40 pm-11:56 pm

1 stop9h 16m

$295

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Tue 4/14

3:46 pm-8:20 am

1 stop18h 34m

San José Juan Santamaria Intl

Tue 4/21

5:46 am-11:09 pm

1 stop15h 23m

$306

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Sun 5/31

4:00 pm-7:12 am

1 stop17h 12m

San José Juan Santamaria Intl

Thu 6/4

10:05 am-11:08 pm

1 stop11h 03m

$308

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Fri 5/1

4:50 pm-11:40 pm

1 stop8h 50m

San José Juan Santamaria Intl

Sun 5/17

7:45 pm-2:50 pm

1 stop17h 05m

$309

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Tue 4/7

3:46 pm-9:05 am

1 stop19h 19m

San José Juan Santamaria Intl

Mon 4/13

5:56 pm-2:31 pm

1 stop18h 35m

$310

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Thu 4/30

3:46 pm-4:47 pm

3 stops27h 01m

San José Juan Santamaria Intl

Thu 5/7

5:47 am-11:08 pm

1 stop15h 21m

$311

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Tue 5/5

4:00 pm-7:12 am

1 stop17h 12m

San José Juan Santamaria Intl

Sun 5/10

4:10 am-11:08 pm

1 stop16h 58m

$314

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Wed 5/6

8:45 am-7:07 pm

1 stop12h 22m

San José Juan Santamaria Intl

Thu 5/14

12:35 pm-11:07 pm

1 stop8h 32m

$318
Quickest round-trip

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sun 3/29

10:36 am-2:30 pm

Nonstop5h 54m

Liberia

Mon 4/6

3:15 pm-10:38 pm

Nonstop5h 23m

$391

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sun 5/17

8:20 pm-12:00 pm

1 stop17h 40m

Liberia

Wed 6/10

1:25 pm-1:03 am

1 stop9h 38m

$416

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 Costa Rica from

How to get the cheapest flight ticket from Boston 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 month to fly to Costa Rica?

The cheapest month to fly to Costa Rica from Boston is in October. Flight prices, which tend to average around $347, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in October, then September is your next best option. Flight prices from Boston to Costa Rica during September average around $383.

What is the cheapest Boston Logan Intl to Costa Rica flight route?

Fly from Boston Logan Intl to Liberia for the best Boston Logan Intl - Costa Rica flight prices

How far in advance should I book a flight to Costa Rica?

You are more likely to see cheaper flights to Costa Rica from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Costa Rica for around $458 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Costa Rica from Boston for as low as $363 on momondo.

What cabin class options are available on Boston Logan Intl to Costa Rica flights?

There are 2 cabin classes available to choose from on Boston Logan Intl to Costa Rica flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Boston to Costa Rica flights?

You could potentially save up to 11% on your flight if you consider stops on a Boston to Costa Rica flight.

Cheap Boston to Costa Rica flight deals and tips

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

Best Price Found

$236

Fastest flight time

5h 40m

Direct flights

Every day

Airports in Costa Rica

40 airports
The best one-way flight to Costa Rica from Boston in the past 72 hours is $236. The best round-trip flight deal from Boston to Costa Rica found on momondo in the last 72 hours is $386.
The fastest flight from Boston to Costa Rica takes 5h 40m
Direct flights go from Boston to Costa Rica every day.
There are 40 airports in Costa Rica. From Boston there are direct flights to Liberia (LIR).
Search flight deals

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Costa Rica?

    Prices for flights from Boston Logan Intl Airport to Costa Rica are refreshed on a daily basis.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Costa Rica?

  • How old do you have to be to fly from Boston Logan Intl Airport to Costa Rica?

    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 Boston Logan Intl Airport to Costa Rica.

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

    The necessary travel and health documents for your Costa Rica trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Boston to Costa Rica?

Best airlines flying from Boston to Costa Rica

Compare and see reviews for airlines that fly from Boston to Costa Rica with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $137Free CancellationRating
7.9
8,294 reviews
Search Delta flights
Spirit AirlinesPriceFrom $145Free CancellationRating
6.3
8,518 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $159Free CancellationRating
7.4
9,427 reviews
Search United Airlines flights
Air CanadaPriceFrom $159Free CancellationRating
7.1
10,801 reviews
Search Air Canada flights
Copa AirlinesPriceFrom $181Free CancellationRating
7.5
1,569 reviews
Search Copa Airlines flights
AviancaPriceFrom $236Free CancellationRating
6.5
2,500 reviews
Search Avianca flights
JetBluePriceFrom $251Free CancellationRating
7.2
2,907 reviews
Search JetBlue flights
American AirlinesPriceFrom $289Free CancellationRating
7.1
11,471 reviews
Search American Airlines flights
FrontierPriceFrom $351Free CancellationRating
5.7
3,032 reviews
Search Frontier flights
SouthwestPriceFrom $404Free CancellationRating
8.0
4,318 reviews
Search Southwest flights

Why use momondo?

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

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

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

Flights from Boston to Costa Rica with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Costa Rica from Boston.

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

Price alerts on flights to Costa Rica from Boston 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.

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