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Cheap flights from Boston to Costa Rica from $119

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 2/23. 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

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Spirit Airlines Logo
5:27 am - 12:22 pm
BOS
-
SJO
7h 55m
1 stop
Spirit Airlines Logo
1:31 pm - 11:44 pm
SJO
-
BOS
9h 13m
1 stop
$279Spirit Airlines
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
3:54 pm - 11:25 am
BOS
-
SJO
20h 31m
2 stops
Multiple Airlines Logo
12:31 pm - 11:44 pm
SJO
-
BOS
9h 13m
1 stop
$280Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Copa Airlines Logo
3:07 pm - 7:06 am
BOS
-
SJO
16h 59m
1 stop
Copa Airlines Logo
8:11 am - 10:03 pm
SJO
-
BOS
12h 52m
1 stop
$281Copa Airlines
Thu, Feb 5 - Thu, Feb 12
Spirit Airlines Logo
6:10 pm - 12:22 pm
BOS
-
SJO
19h 12m
1 stop
Spirit Airlines Logo
1:31 pm - 11:44 pm
SJO
-
BOS
9h 13m
1 stop
$282Spirit Airlines
Sun, Mar 1 - Wed, Mar 4
Copa Airlines Logo
3:07 pm - 4:46 pm
BOS
-
SJO
26h 39m
3 stops
Copa Airlines Logo
5:50 am - 10:10 pm
SJO
-
BOS
15h 20m
1 stop
$286Copa Airlines
Thu, Feb 26 - Fri, Mar 6
JetBlue Logo
9:52 am - 1:35 pm
BOS
-
LIR
5h 43mnonstop
JetBlue Logo
2:55 pm - 10:18 pm
LIR
-
BOS
5h 23mnonstop
$331JetBlue
Wed, Apr 15 - Tue, Apr 21
JetBlue Logo
9:52 am - 1:35 pm
BOS
-
LIR
5h 43mnonstop
JetBlue Logo
2:55 pm - 10:18 pm
LIR
-
BOS
5h 23mnonstop
$332JetBlue
Wed, Apr 15 - Tue, Apr 21
Delta Logo
8:59 pm - 11:15 am
BOS
-
LIR
15h 16m
1 stop
Delta Logo
2:45 pm - 10:50 am
LIR
-
BOS
19h 05m
1 stop
$338Delta
Fri, Feb 20 - Fri, Mar 6
American Airlines Logo
5:00 am - 2:13 pm
BOS
-
LIR
10h 13m
1 stop
American Airlines Logo
3:29 pm - 10:02 am
LIR
-
BOS
17h 33m
1 stop
$346American Airlines
Tue, Feb 24 - Mon, Mar 2
American Airlines Logo
7:02 pm - 12:37 pm
BOS
-
LIR
18h 35m
1 stop
American Airlines Logo
3:13 pm - 12:59 am
LIR
-
BOS
8h 46m
1 stop
$347American Airlines
Sat, Feb 21 - Thu, Mar 5

American Airlines flights from Boston to Costa Rica

Our best American Airlines deals on Boston to Costa Rica flight tickets
American Airlines
Feb 3
BOS2:43 pmBoston Logan Intl
8h 47m
1 stop
SJO10:30 pmSan José Juan Santamaria Intl
Feb 6
SJO6:38 amSan José Juan Santamaria Intl
9h 42m
1 stop
BOS5:20 pmBoston Logan Intl
$279
American Airlines
Feb 3
BOS11:10 amBoston Logan Intl
12h 20m
2 stops
SJO10:30 pmSan José Juan Santamaria Intl
Feb 6
SJO6:38 amSan José Juan Santamaria Intl
14h 17m
1 stop
BOS9:55 pmBoston Logan Intl
$287
American Airlines
Mar 3
BOS9:57 amBoston Logan Intl
11h 15m
2 stops
SJO8:12 pmSan José Juan Santamaria Intl
Mar 9
SJO11:35 pmSan José Juan Santamaria Intl
15h 39m
1 stop
BOS5:14 pmBoston Logan Intl
$304

Spirit Airlines flights from Boston to Costa Rica

Our best Spirit Airlines deals on Boston to Costa Rica flight tickets
Spirit Airlines
Feb 18
BOS5:27 amBoston Logan Intl
7h 55m
1 stop
SJO12:22 pmSan José Juan Santamaria Intl
Feb 25
SJO1:31 pmSan José Juan Santamaria Intl
9h 13m
1 stop
BOS11:44 pmBoston Logan Intl
$279
Spirit Airlines
Mar 1
BOS6:10 pmBoston Logan Intl
19h 12m
1 stop
SJO12:22 pmSan José Juan Santamaria Intl
Mar 4
SJO1:31 pmSan José Juan Santamaria Intl
9h 13m
1 stop
BOS11:44 pmBoston Logan Intl
$282
Spirit Airlines
Feb 23
BOS6:10 pmBoston Logan Intl
18h 30m
2 stops
SJO11:40 amSan José Juan Santamaria Intl
Mar 4
SJO1:31 pmSan José Juan Santamaria Intl
9h 13m
1 stop
BOS11:44 pmBoston Logan Intl
$283

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 January 28, 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

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Wed 2/18

5:27 am-12:22 pm

1 stop7h 55m

San José Juan Santamaria Intl

Wed 2/25

1:31 pm-11:44 pm

1 stop9h 13m

$279

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Wed 3/4

3:54 pm-11:25 am

2 stops20h 31m

San José Juan Santamaria Intl

Wed 3/11

12:31 pm-11:44 pm

1 stop9h 13m

$280

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Thu 2/5

3:07 pm-7:06 am

1 stop16h 59m

San José Juan Santamaria Intl

Thu 2/12

8:11 am-10:03 pm

1 stop12h 52m

$281

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Sun 3/1

6:10 pm-12:22 pm

1 stop19h 12m

San José Juan Santamaria Intl

Wed 3/4

1:31 pm-11:44 pm

1 stop9h 13m

$282

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Thu 2/26

3:07 pm-4:46 pm

3 stops26h 39m

San José Juan Santamaria Intl

Fri 3/6

5:50 am-10:10 pm

1 stop15h 20m

$286

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Wed 4/15

9:52 am-1:35 pm

Nonstop5h 43m

Liberia

Tue 4/21

2:55 pm-10:18 pm

Nonstop5h 23m

$331

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Wed 4/15

9:52 am-1:35 pm

Nonstop5h 43m

Liberia

Tue 4/21

2:55 pm-10:18 pm

Nonstop5h 23m

$332

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Fri 2/20

8:59 pm-11:15 am

1 stop15h 16m

Liberia

Fri 3/6

2:45 pm-10:50 am

1 stop19h 05m

$338

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Tue 2/24

5:00 am-2:13 pm

1 stop10h 13m

Liberia

Mon 3/2

3:29 pm-10:02 am

1 stop17h 33m

$346

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sat 2/21

7:02 pm-12:37 pm

1 stop18h 35m

Liberia

Thu 3/5

3:13 pm-12:59 am

1 stop8h 46m

$347

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 $386, 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 $389.

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 $482 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 $410 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 25% 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

$142

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 $142. The best round-trip flight deal from Boston to Costa Rica found on momondo in the last 72 hours is $311.
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
Air CanadaPriceFrom $159Free CancellationRating
7.1
10,667 reviews
Search Air Canada flights
Spirit AirlinesPriceFrom $162Free CancellationRating
6.3
8,393 reviews
Search Spirit Airlines flights
Copa AirlinesPriceFrom $211Free CancellationRating
7.5
1,560 reviews
Search Copa Airlines flights
DeltaPriceFrom $216Free CancellationRating
7.9
8,128 reviews
Search Delta flights
AviancaPriceFrom $236Free CancellationRating
6.6
2,490 reviews
Search Avianca flights
United AirlinesPriceFrom $243Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
JetBluePriceFrom $251Free CancellationRating
7.2
2,892 reviews
Search JetBlue flights
FrontierPriceFrom $264Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
American AirlinesPriceFrom $305Free CancellationRating
7.2
11,205 reviews
Search American Airlines flights
SouthwestPriceFrom $441Free CancellationRating
8.0
4,267 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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