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Cheap flights from Boston to Costa Rica from $114

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 1/8. 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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Find the cheapest flights from Boston to Costa Rica

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
12:55 pm - 10:30 pm
BOS
-
SJO
10h 35m1 stop
American Airlines Logo
6:00 am - 7:02 pm
SJO
-
BOS
12h 02m2 stops
$253American Airlines
Mon, Feb 2 - Tue, Feb 10
American Airlines Logo
6:36 am - 8:14 pm
BOS
-
SJO
14h 38m1 stop
American Airlines Logo
7:09 am - 8:45 pm
SJO
-
BOS
12h 36m1 stop
$254American Airlines
Thu, Jan 1 - Sat, Jan 17
American Airlines Logo
11:10 am - 10:30 pm
BOS
-
SJO
12h 20m2 stops
American Airlines Logo
3:55 pm - 9:49 am
SJO
-
BOS
16h 54m1 stop
$255American Airlines
Tue, Feb 3 - Thu, Feb 12
Spirit Airlines Logo
5:34 am - 12:22 pm
BOS
-
SJO
7h 48m1 stop
Spirit Airlines Logo
1:30 pm - 11:57 pm
SJO
-
BOS
9h 27m1 stop
$257Spirit Airlines
Mon, Feb 2 - Sun, Feb 8
Spirit Airlines Logo
5:34 am - 12:22 pm
BOS
-
SJO
7h 48m1 stop
Spirit Airlines Logo
1:30 pm - 11:57 pm
SJO
-
BOS
9h 27m1 stop
$258Spirit Airlines
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
6:00 am - 12:42 pm
BOS
-
SJO
7h 42m1 stop
United Airlines Logo
5:30 am - 9:54 pm
SJO
-
BOS
14h 24m1 stop
$264United Airlines
Mon, Mar 2 - Tue, Mar 10
Delta Logo
6:55 am - 1:50 pm
BOS
-
LIR
7h 55m1 stop
Delta Logo
1:40 pm - 7:55 pm
LIR
-
BOS
5h 15mnonstop
$301Delta
Mon, Jan 19 - Sat, Jan 24
JetBlue Logo
8:15 am - 1:10 pm
BOS
-
LIR
5h 55mnonstop
JetBlue Logo
4:35 pm - 10:55 pm
LIR
-
BOS
5h 20mnonstop
$303JetBlue
Sat, Jan 3 - Sat, Jan 10
Delta Logo
7:25 am - 12:25 pm
BOS
-
LIR
6h 00mnonstop
Delta Logo
3:05 pm - 1:09 am
LIR
-
BOS
9h 04m1 stop
$306Delta
Sat, Feb 7 - Thu, Feb 12
JetBlue Logo
5:15 am - 2:50 pm
BOS
-
LIR
10h 35m1 stop
JetBlue Logo
3:36 pm - 9:56 pm
LIR
-
BOS
5h 20mnonstop
$307JetBlue
Sat, Feb 14 - Sat, Feb 21

United Airlines flights from Boston to Costa Rica

Our best United Airlines deals on Boston to Costa Rica flight tickets
United Airlines
Mar 2
BOS6:00 amBoston Logan Intl
7h 42m
1 stop
SJO12:42 pmSan José Juan Santamaria Intl
Mar 10
SJO5:30 amSan José Juan Santamaria Intl
14h 24m
1 stop
BOS9:54 pmBoston Logan Intl
$264
Find similar
United Airlines
Jan 21
BOS9:30 amBoston Logan Intl
12h 09m
2 stops
SJO8:39 pmSan José Juan Santamaria Intl
Jan 28
SJO6:30 amSan José Juan Santamaria Intl
11h 27m
2 stops
BOS6:57 pmBoston Logan Intl
$268
Find similar
United Airlines
Jan 24
BOS6:00 amBoston Logan Intl
13h 37m
2 stops
LIR6:37 pmLiberia
Jan 31
LIR8:35 amLiberia
12h 22m
2 stops
BOS9:57 pmBoston Logan Intl
$333
Find similar

Copa Airlines flights from Boston to Costa Rica

Our best Copa Airlines deals on Boston to Costa Rica flight tickets
Copa Airlines
Feb 10
BOS3:07 pmBoston Logan Intl
18h 14m
1 stop
SJO8:21 amSan José Juan Santamaria Intl
Feb 17
SJO10:08 amSan José Juan Santamaria Intl
10h 55m
1 stop
BOS10:03 pmBoston Logan Intl
$282
Find similar
Copa Airlines
Feb 5
BOS3:07 pmBoston Logan Intl
26h 39m
3 stops
SJO4:46 pmSan José Juan Santamaria Intl
Feb 10
SJO10:08 amSan José Juan Santamaria Intl
10h 55m
1 stop
BOS10:03 pmBoston Logan Intl
$287
Find similar
Copa Airlines
Jan 18
BOS3:07 pmBoston Logan Intl
18h 14m
1 stop
SJO8:21 amSan José Juan Santamaria Intl
Jan 26
SJO11:01 amSan José Juan Santamaria Intl
10h 02m
1 stop
BOS10:03 pmBoston Logan Intl
$291
Find similar

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 December 11, 2025.
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

Mon 2/2

12:55 pm-10:30 pm

1 stop10h 35m

San José Juan Santamaria Intl

Tue 2/10

6:00 am-7:02 pm

2 stops12h 02m

$253

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Thu 1/1

6:36 am-8:14 pm

1 stop14h 38m

San José Juan Santamaria Intl

Sat 1/17

7:09 am-8:45 pm

1 stop12h 36m

$254

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Tue 2/3

11:10 am-10:30 pm

2 stops12h 20m

San José Juan Santamaria Intl

Thu 2/12

3:55 pm-9:49 am

1 stop16h 54m

$255

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Mon 2/2

5:34 am-12:22 pm

1 stop7h 48m

San José Juan Santamaria Intl

Sun 2/8

1:30 pm-11:57 pm

1 stop9h 27m

$257

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Sat 1/31

5:34 am-12:22 pm

1 stop7h 48m

San José Juan Santamaria Intl

Sat 2/7

1:30 pm-11:57 pm

1 stop9h 27m

$258

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Mon 3/2

6:00 am-12:42 pm

1 stop7h 42m

San José Juan Santamaria Intl

Tue 3/10

5:30 am-9:54 pm

1 stop14h 24m

$264

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Mon 1/19

6:55 am-1:50 pm

1 stop7h 55m

Liberia

Sat 1/24

1:40 pm-7:55 pm

Nonstop5h 15m

$301

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sat 1/3

8:15 am-1:10 pm

Nonstop5h 55m

Liberia

Sat 1/10

4:35 pm-10:55 pm

Nonstop5h 20m

$303

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sat 2/7

7:25 am-12:25 pm

Nonstop6h 00m

Liberia

Thu 2/12

3:05 pm-1:09 am

1 stop9h 04m

$306

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sat 2/14

5:15 am-2:50 pm

1 stop10h 35m

Liberia

Sat 2/21

3:36 pm-9:56 pm

Nonstop5h 20m

$307

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 September. 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 September, then November is your next best option. Flight prices from Boston to Costa Rica during November average around $388.

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

According to our data, Tuesday is the cheapest day to fly to Costa Rica from Boston. The lowest ticket price found for a Tuesday departure recently was $450. 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 Saturday because tickets tend to average around $660. 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 evening is the cheapest time of day to fly from Boston to Costa Rica when you can find flight prices for as low as $445. Flying to Costa Rica in the evening is an ideal time because this is during off-peak travel hours. Flights to Costa Rica are more costly in the morning, with an average ticket price of $583. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $496 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 $439 on momondo.

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

There are 3 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 23% 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

$167

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 $167. The best round-trip flight deal from Boston to Costa Rica found on momondo in the last 72 hours is $336.
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 $161Free CancellationRating
7.1
10,517 reviews
Search Air Canada flights
Spirit AirlinesPriceFrom $218Free CancellationRating
6.3
8,180 reviews
Search Spirit Airlines flights
JetBluePriceFrom $252Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
United AirlinesPriceFrom $270Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
Copa AirlinesPriceFrom $272Free CancellationRating
7.6
1,558 reviews
Search Copa Airlines flights
FrontierPriceFrom $297Free CancellationRating
5.8
3,084 reviews
Search Frontier flights
DeltaPriceFrom $311Free CancellationRating
7.9
8,007 reviews
Search Delta flights
AviancaPriceFrom $318Free CancellationRating
6.6
2,480 reviews
Search Avianca flights
American AirlinesPriceFrom $325Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
SouthwestPriceFrom $441Free CancellationRating
7.9
4,253 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.

An easier way to manage your Costa Rica trip

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Find better results for your trip to Costa Rica

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