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Cheap flights from Boston to Costa Rica from $145

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 6/15. 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 Boston to Costa Rica

Cheap round-trip flights

Enter your travel dates to find the best prices.
Avianca Logo
4:50 pm - 11:40 pm
BOS
-
SJO
8h 50m
1 stop
Avianca Logo
5:05 am - 2:50 pm
SJO
-
BOS
7h 45m
1 stop
$339Avianca
Wed, Jun 10 - Thu, Jun 18
Avianca Logo
4:50 pm - 11:40 pm
BOS
-
SJO
8h 50m
1 stop
Avianca Logo
5:05 am - 2:50 pm
SJO
-
BOS
7h 45m
1 stop
$343Avianca
Wed, Jun 10 - Sun, Jun 14
Copa Airlines Logo
4:00 pm - 8:21 am
BOS
-
SJO
18h 21m
1 stop
Copa Airlines Logo
10:05 am - 11:08 pm
SJO
-
BOS
11h 03m
1 stop
$344Copa Airlines
Thu, May 14 - Sun, May 17
Avianca Logo
4:50 pm - 11:40 pm
BOS
-
SJO
8h 50m
1 stop
Avianca Logo
5:05 am - 2:50 pm
SJO
-
BOS
7h 45m
1 stop
$347Avianca
Sat, Aug 29 - Fri, Sep 4
American Airlines Logo
7:00 am - 10:42 pm
BOS
-
SJO
17h 42m
1 stop
American Airlines Logo
6:01 am - 12:59 am
SJO
-
BOS
16h 58m
1 stop
$350American Airlines
Fri, May 29 - Mon, Jun 8
Copa Airlines Logo
4:00 pm - 9:47 pm
BOS
-
SJO
7h 47m
1 stop
Copa Airlines Logo
10:05 am - 11:08 pm
SJO
-
BOS
11h 03m
1 stop
$354Copa Airlines
Thu, May 14 - Mon, May 18
American Airlines Logo
7:19 pm - 11:05 am
BOS
-
SJO
17h 46m
2 stops
American Airlines Logo
2:45 pm - 12:34 am
SJO
-
BOS
7h 49m
1 stop
$355American Airlines
Wed, Oct 14 - Wed, Oct 21
JetBlue Logo
8:05 pm - 11:55 am
BOS
-
LIR
17h 50m
1 stop
JetBlue Logo
2:00 pm - 8:15 am
LIR
-
BOS
16h 15m
1 stop
$469JetBlue
Sun, May 24 - Fri, May 29
United Airlines Logo
8:26 pm - 10:44 am
BOS
-
LIR
16h 18m
1 stop
United Airlines Logo
4:30 pm - 8:17 am
LIR
-
BOS
13h 47m
1 stop
$474United Airlines
Tue, Jun 16 - Tue, Jun 23
United Airlines Logo
5:35 pm - 9:50 am
BOS
-
LIR
18h 15m
1 stop
United Airlines Logo
11:10 am - 11:19 pm
LIR
-
BOS
10h 09m
1 stop
$476United Airlines
Sat, May 23 - Fri, May 29

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Avianca flights from Boston to Costa Rica

Our best Avianca deals on Boston to Costa Rica flight tickets
Avianca
Jun 10
BOS4:50 pmBoston Logan Intl
8h 50m
1 stop
SJO11:40 pmSan José Juan Santamaria Intl
Jun 18
SJO5:05 amSan José Juan Santamaria Intl
7h 45m
1 stop
BOS2:50 pmBoston Logan Intl
$339
Avianca
Jun 10
BOS4:50 pmBoston Logan Intl
8h 50m
1 stop
SJO11:40 pmSan José Juan Santamaria Intl
Jun 14
SJO5:05 amSan José Juan Santamaria Intl
7h 45m
1 stop
BOS2:50 pmBoston Logan Intl
$343
Avianca
Jun 1
BOS4:50 pmBoston Logan Intl
8h 50m
1 stop
SJO11:40 pmSan José Juan Santamaria Intl
Jun 4
SJO7:45 pmSan José Juan Santamaria Intl
17h 05m
1 stop
BOS2:50 pmBoston Logan Intl
$349

Copa Airlines flights from Boston to Costa Rica

Our best Copa Airlines deals on Boston to Costa Rica flight tickets
Copa Airlines
May 14
BOS4:00 pmBoston Logan Intl
19h 06m
1 stop
SJO9:06 amSan José Juan Santamaria Intl
May 22
SJO10:05 amSan José Juan Santamaria Intl
11h 03m
1 stop
BOS11:08 pmBoston Logan Intl
$344
Copa Airlines
May 14
BOS4:00 pmBoston Logan Intl
7h 47m
1 stop
SJO9:47 pmSan José Juan Santamaria Intl
May 18
SJO10:05 amSan José Juan Santamaria Intl
11h 03m
1 stop
BOS11:08 pmBoston Logan Intl
$354
Copa Airlines
May 14
BOS4:00 pmBoston Logan Intl
7h 47m
1 stop
SJO9:47 pmSan José Juan Santamaria Intl
May 26
SJO6:19 pmSan José Juan Santamaria Intl
18h 25m
1 stop
BOS2:44 pmBoston Logan Intl
$359

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 May 5, 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
Quickest round-trip

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Wed 6/10

4:50 pm-11:40 pm

1 stop8h 50m

San José Juan Santamaria Intl

Thu 6/18

5:05 am-2:50 pm

1 stop7h 45m

$339

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Wed 6/10

4:50 pm-11:40 pm

1 stop8h 50m

San José Juan Santamaria Intl

Sun 6/14

5:05 am-2:50 pm

1 stop7h 45m

$343

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Thu 5/14

4:00 pm-8:21 am

1 stop18h 21m

San José Juan Santamaria Intl

Sun 5/17

10:05 am-11:08 pm

1 stop11h 03m

$344

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Sat 8/29

4:50 pm-11:40 pm

1 stop8h 50m

San José Juan Santamaria Intl

Fri 9/4

5:05 am-2:50 pm

1 stop7h 45m

$347

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Fri 5/29

7:00 am-10:42 pm

1 stop17h 42m

San José Juan Santamaria Intl

Mon 6/8

6:01 am-12:59 am

1 stop16h 58m

$350

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Thu 5/14

4:00 pm-9:47 pm

1 stop7h 47m

San José Juan Santamaria Intl

Mon 5/18

10:05 am-11:08 pm

1 stop11h 03m

$354

BostonSan José

BOS - SJO

BOSSJO

Boston Logan Intl

Wed 10/14

7:19 pm-11:05 am

2 stops17h 46m

San José Juan Santamaria Intl

Wed 10/21

2:45 pm-12:34 am

1 stop7h 49m

$355

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sun 5/24

8:05 pm-11:55 am

1 stop17h 50m

Liberia

Fri 5/29

2:00 pm-8:15 am

1 stop16h 15m

$469

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Tue 6/16

8:26 pm-10:44 am

1 stop16h 18m

Liberia

Tue 6/23

4:30 pm-8:17 am

1 stop13h 47m

$474

BostonLiberia

BOS - LIR

BOSLIR

Boston Logan Intl

Sat 5/23

5:35 pm-9:50 am

1 stop18h 15m

Liberia

Fri 5/29

11:10 am-11:19 pm

1 stop10h 09m

$476

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 $73, 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 October is your next best option. Flight prices from Boston to Costa Rica during October average around $107.

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 from Boston 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 $456 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 $381 on momondo.

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

You could potentially save up to 2% 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

$622

Fastest flight time

5h 49m

Direct flights

Sun

Airports in Costa Rica

40 airports
The best flight deal from Boston to Costa Rica found on momondo in the last 72 hours is $622
The fastest flight from Boston to Costa Rica takes 5h 49m
Direct flights go from Boston to Costa Rica on Sunday. The only airline offering direct flights is JetBlue.
There are 40 airports in Costa Rica. From Boston there are direct flights to Liberia (LIR).
Search flight deals

Frequently asked questions about flying from Boston to Costa Rica

  • 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
8,459 reviews
Search Delta flights
Spirit AirlinesPriceFrom $141Free CancellationRating
6.3
8,634 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $159Free CancellationRating
7.4
9,683 reviews
Search United Airlines flights
Air CanadaPriceFrom $159Free CancellationRating
7.1
10,998 reviews
Search Air Canada flights
Copa AirlinesPriceFrom $178Free CancellationRating
7.5
1,580 reviews
Search Copa Airlines flights
JetBluePriceFrom $251Free CancellationRating
7.1
2,977 reviews
Search JetBlue flights
American AirlinesPriceFrom $287Free CancellationRating
7.1
11,668 reviews
Search American Airlines flights
AviancaPriceFrom $289Free CancellationRating
6.5
2,522 reviews
Search Avianca flights
GOLPriceFrom $316Free CancellationRating
7.3
1,209 reviews
Search GOL flights
FrontierPriceFrom $381Free CancellationRating
5.6
2,965 reviews
Search Frontier 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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