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Cheap flights from Boston to Costa Rica from $157

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 11/17. 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

Discover deals from 900+ travel sites with momondo.

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
6:00 am - 1:18 pmBOS  Boston Logan Intl-LIR Liberia
9h 18m2 stops Philadelphia Miami
American Airlines Logo
2:47 pm - 10:14 amLIR  Liberia-BOS Boston Logan Intl
17h 27m1 stop Miami
$344American Airlines
Mon, Sep 14 - Wed, Sep 23
American Airlines Logo
6:00 am - 1:18 pmBOS  Boston Logan Intl-LIR Liberia
9h 18m1 stop Miami
American Airlines Logo
2:47 pm - 12:59 amLIR  Liberia-BOS Boston Logan Intl
8h 12m1 stop Miami
$344American Airlines
Mon, Sep 14 - Wed, Sep 23
United Airlines Logo
8:00 pm - 11:44 amBOS  Boston Logan Intl-LIR Liberia
16h 44m1 stop Newark
United Airlines Logo
5:15 pm - 8:44 amLIR  Liberia-BOS Boston Logan Intl
14h 29m1 stop Newark
$352United Airlines
Sun, Dec 6 - Fri, Dec 11
United Airlines Logo
8:21 pm - 12:10 pmBOS  Boston Logan Intl-LIR Liberia
17h 49m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
United Airlines Logo
1:20 pm - 9:33 amLIR  Liberia-BOS Boston Logan Intl
18h 13m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
$357United Airlines
Tue, Sep 8 - Tue, Sep 22
Air Canada Logo
6:50 pm - 11:50 amBOS  Boston Logan Intl-LIR Liberia
19h 00m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
Air Canada Logo
2:10 pm - 10:17 amLIR  Liberia-BOS Boston Logan Intl
18h 07m1 stop Toronto Pearson Intl
$379Air Canada
Fri, Oct 23 - Wed, Oct 28
Air Canada Logo
5:45 am - 1:10 pmBOS  Boston Logan Intl-LIR Liberia
9h 25m1 stop Toronto Pearson Intl
Air Canada Logo
3:20 pm - 9:28 pmLIR  Liberia-BOS Boston Logan Intl
29h 08m1 stop Montreal Pierre Elliott Trudeau Intl
$380Air Canada
Thu, Oct 29 - Tue, Nov 3
Copa Airlines Logo
2:43 pm - 9:04 amBOS  Boston Logan Intl-SJO San José Juan Santamaria Intl
19h 21m1 stop Panama City Tocumen Intl
Copa Airlines Logo
5:52 pm - 9:57 pmSJO  San José Juan Santamaria Intl-BOS Boston Logan Intl
27h 05m1 stop Panama City Tocumen Intl
$384Copa Airlines
Tue, Jan 19 - Mon, Jan 25
Avianca Logo
3:25 pm - 11:40 pmBOS  Boston Logan Intl-SJO San José Juan Santamaria Intl
9h 15m1 stop San Salvador El Salvador Intl
Avianca Logo
5:00 am - 1:50 pmSJO  San José Juan Santamaria Intl-BOS Boston Logan Intl
7h 50m1 stop San Salvador El Salvador Intl
$389Avianca
Mon, Jan 25 - Mon, Feb 1
Avianca Logo
4:25 pm - 11:40 pmBOS  Boston Logan Intl-SJO San José Juan Santamaria Intl
9h 15m1 stop San Salvador El Salvador Intl
Avianca Logo
7:50 pm - 1:50 pmSJO  San José Juan Santamaria Intl-BOS Boston Logan Intl
17h 00m1 stop San Salvador El Salvador Intl
$389Avianca
Sun, Oct 25 - Sun, Nov 1
Copa Airlines Logo
2:43 pm - 11:02 amBOS  Boston Logan Intl-SJO San José Juan Santamaria Intl
21h 19m1 stop Panama City Tocumen Intl
Copa Airlines Logo
6:03 pm - 10:02 pmSJO  San José Juan Santamaria Intl-BOS Boston Logan Intl
26h 59m1 stop Panama City Tocumen Intl
$399Copa Airlines
Mon, Dec 7 - Sun, Dec 13

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Avianca flights from Boston to Costa Rica

Our best Avianca deals on Boston to Costa Rica flight tickets
Avianca
Sep 11
BOS4:50 pmBoston Logan Intl
8h 50m
1 stop
SJO11:40 pmSan José Juan Santamaria Intl
Dec 11
SJO5:00 amSan José Juan Santamaria Intl
7h 50m
1 stop
BOS1:50 pmBoston Logan Intl
$389
Avianca
Oct 9
BOS4:50 pmBoston Logan Intl
8h 50m
1 stop
SJO11:40 pmSan José Juan Santamaria Intl
Oct 13
SJO7:45 pmSan José Juan Santamaria Intl
17h 05m
1 stop
BOS2:50 pmBoston Logan Intl
$399
Avianca
Nov 11
BOS3:25 pmBoston Logan Intl
9h 15m
1 stop
SJO11:40 pmSan José Juan Santamaria Intl
Feb 3
SJO5:00 amSan José Juan Santamaria Intl
7h 50m
1 stop
BOS1:50 pmBoston Logan Intl
$405

Delta flights from Boston to Costa Rica

Our best Delta deals on Boston to Costa Rica flight tickets
Delta
Nov 11
BOS10:10 amBoston Logan Intl
13h 05m
1 stop
SJO10:15 pmSan José Juan Santamaria Intl
Feb 3
SJO2:10 pmSan José Juan Santamaria Intl
8h 16m
1 stop
BOS11:26 pmBoston Logan Intl
$391
Delta
Aug 12
BOS7:20 pmBoston Logan Intl
18h 40m
1 stop
LIR12:00 pmLiberia
Sep 2
LIR1:25 pmLiberia
10h 00m
1 stop
BOS1:25 amBoston Logan Intl
$652
Delta
Aug 24
BOS8:45 pmBoston Logan Intl
17h 15m
1 stop
LIR12:00 pmLiberia
Aug 31
LIR1:25 pmLiberia
10h 00m
1 stop
BOS1:25 amBoston Logan Intl
$674

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 August 10, 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

BostonLiberia

BOS Boston Logan Intl - LIR Liberia

BOSLIR

Boston Logan Intl

Mon 9/14

6:00 am-1:18 pm

2 stops9h 18m

Liberia

Wed 9/23

2:47 pm-10:14 am

1 stop17h 27m

$344

BostonLiberia

BOS Boston Logan Intl - LIR Liberia

BOSLIR

Boston Logan Intl

Mon 9/14

6:00 am-1:18 pm

1 stop9h 18m

Liberia

Wed 9/23

2:47 pm-12:59 am

1 stop8h 12m

$344

BostonLiberia

BOS Boston Logan Intl - LIR Liberia

BOSLIR

Boston Logan Intl

Sun 12/6

8:00 pm-11:44 am

1 stop16h 44m

Liberia

Fri 12/11

5:15 pm-8:44 am

1 stop14h 29m

$352

BostonLiberia

BOS Boston Logan Intl - LIR Liberia

BOSLIR

Boston Logan Intl

Tue 9/8

8:21 pm-12:10 pm

2 stops17h 49m

Liberia

Tue 9/22

1:20 pm-9:33 am

2 stops18h 13m

$357

BostonLiberia

BOS Boston Logan Intl - LIR Liberia

BOSLIR

Boston Logan Intl

Fri 10/23

6:50 pm-11:50 am

2 stops19h 00m

Liberia

Wed 10/28

2:10 pm-10:17 am

1 stop18h 07m

$379

BostonLiberia

BOS Boston Logan Intl - LIR Liberia

BOSLIR

Boston Logan Intl

Thu 10/29

5:45 am-1:10 pm

1 stop9h 25m

Liberia

Tue 11/3

3:20 pm-9:28 pm

1 stop29h 08m

$380

BostonSan José

BOS Boston Logan Intl - SJO San José Juan Santamaria Intl

BOSSJO

Boston Logan Intl

Tue 1/19

2:43 pm-9:04 am

1 stop19h 21m

San José Juan Santamaria Intl

Mon 1/25

5:52 pm-9:57 pm

1 stop27h 05m

$384
Quickest round-trip

BostonSan José

BOS Boston Logan Intl - SJO San José Juan Santamaria Intl

BOSSJO

Boston Logan Intl

Mon 1/25

3:25 pm-11:40 pm

1 stop9h 15m

San José Juan Santamaria Intl

Mon 2/1

5:00 am-1:50 pm

1 stop7h 50m

$389

BostonSan José

BOS Boston Logan Intl - SJO San José Juan Santamaria Intl

BOSSJO

Boston Logan Intl

Sun 10/25

4:25 pm-11:40 pm

1 stop9h 15m

San José Juan Santamaria Intl

Sun 11/1

7:50 pm-1:50 pm

1 stop17h 00m

$389

BostonSan José

BOS Boston Logan Intl - SJO San José Juan Santamaria Intl

BOSSJO

Boston Logan Intl

Mon 12/7

2:43 pm-11:02 am

1 stop21h 19m

San José Juan Santamaria Intl

Sun 12/13

6:03 pm-10:02 pm

1 stop26h 59m

$399

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 $370, 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 $410.

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 $468 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 $394 on momondo.

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

There are 3 cabin classes available to choose from on Boston 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 13% 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

$271

Fastest flight time

5h 49m

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 $271. The best round-trip flight deal from Boston to Costa Rica found on momondo in the last 72 hours is $603.
The fastest flight from Boston to Costa Rica takes 5h 49m
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

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
7.8
8,500 reviews
Search Delta flights
United AirlinesPriceFrom $159Free CancellationRating
7.4
10,100 reviews
Search United Airlines flights
Air CanadaPriceFrom $169Free CancellationRating
7.1
11,460 reviews
Search Air Canada flights
Copa AirlinesPriceFrom $177Free CancellationRating
7.6
1,563 reviews
Search Copa Airlines flights
JetBluePriceFrom $251Free CancellationRating
7.1
3,031 reviews
Search JetBlue flights
American AirlinesPriceFrom $285Free CancellationRating
7.1
11,899 reviews
Search American Airlines flights
GOLPriceFrom $316Free CancellationRating
7.3
1,272 reviews
Search GOL flights
AviancaPriceFrom $327Free CancellationRating
6.5
2,530 reviews
Search Avianca flights
FrontierPriceFrom $381Free CancellationRating
5.6
2,712 reviews
Search Frontier flights
SouthwestPriceFrom $470Free CancellationRating
8.0
4,218 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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