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Cheap flights from Boston to Kaunas from $636

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Kaunas departing on 5/4. 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 Kaunas

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:50 pm - 9:05 pm
BOS
-
KUN
41h 15m
2 stops
Multiple Airlines Logo
9:40 pm - 6:50 pm
KUN
-
BOS
52h 10m
2 stops
$636Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
6:30 pm - 1:00 pm
BOS
-
KUN
11h 30m
1 stop
Multiple Airlines Logo
3:00 pm - 9:05 pm
KUN
-
BOS
37h 05m
2 stops
$740Multiple Airlines
Sat, May 9 - Mon, May 11
Multiple Airlines Logo
11:30 pm - 12:40 pm
BOS
-
KUN
30h 10m
1 stop
Multiple Airlines Logo
9:40 pm - 9:05 pm
KUN
-
BOS
30h 25m
2 stops
$756Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
11:30 pm - 12:40 pm
BOS
-
KUN
30h 10m
1 stop
Multiple Airlines Logo
2:35 pm - 9:05 pm
KUN
-
BOS
37h 30m
2 stops
$759Multiple Airlines
Mon, May 4 - Tue, May 12
Multiple Airlines Logo
6:30 pm - 1:00 pm
BOS
-
KUN
11h 30m
1 stop
Multiple Airlines Logo
8:50 pm - 9:05 pm
KUN
-
BOS
31h 15m
2 stops
$768Multiple Airlines
Sat, May 9 - Mon, May 11
Multiple Airlines Logo
6:30 pm - 2:15 pm
BOS
-
KUN
12h 45m
1 stop
Multiple Airlines Logo
8:50 pm - 9:05 pm
KUN
-
BOS
31h 15m
2 stops
$774Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
5:45 pm - 9:05 pm
BOS
-
KUN
20h 20m
2 stops
Multiple Airlines Logo
9:40 pm - 7:55 pm
KUN
-
BOS
29h 15m
2 stops
$844Multiple Airlines
Sat, May 9 - Mon, May 11
Multiple Airlines Logo
5:50 am - 12:35 am
BOS
-
KUN
35h 45m
3 stops
Multiple Airlines Logo
7:40 pm - 5:40 pm
KUN
-
BOS
29h 00m
2 stops
$874Multiple Airlines
Sun, Jun 14 - Sat, Jun 20
Multiple Airlines Logo
5:25 pm - 1:30 pm
BOS
-
KUN
13h 05m
1 stop
Multiple Airlines Logo
6:50 am - 2:55 pm
KUN
-
BOS
15h 05m
1 stop
$962Multiple Airlines
Mon, May 4 - Tue, May 12
Multiple Airlines Logo
9:50 pm - 12:35 am
BOS
-
KUN
43h 45m
3 stops
Multiple Airlines Logo
5:35 am - 7:55 pm
KUN
-
BOS
45h 20m
3 stops
$988Multiple Airlines
Mon, May 4 - Mon, May 11

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Kaunas 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 27, 2026.
Use the filters below to find and compare flights from Boston to Kaunas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Mon 5/4

8:50 pm-9:05 pm

2 stops41h 15m

Kaunas

Mon 5/11

9:40 pm-6:50 pm

2 stops52h 10m

$636

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Sat 5/9

6:30 pm-1:00 pm

1 stop11h 30m

Kaunas

Mon 5/11

3:00 pm-9:05 pm

2 stops37h 05m

$740

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Mon 5/4

11:30 pm-12:40 pm

1 stop30h 10m

Kaunas

Mon 5/11

9:40 pm-9:05 pm

2 stops30h 25m

$756

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Mon 5/4

11:30 pm-12:40 pm

1 stop30h 10m

Kaunas

Tue 5/12

2:35 pm-9:05 pm

2 stops37h 30m

$759

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Sat 5/9

6:30 pm-1:00 pm

1 stop11h 30m

Kaunas

Mon 5/11

8:50 pm-9:05 pm

2 stops31h 15m

$768

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Mon 5/11

6:30 pm-2:15 pm

1 stop12h 45m

Kaunas

Mon 5/18

8:50 pm-9:05 pm

2 stops31h 15m

$774

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Sat 5/9

5:45 pm-9:05 pm

2 stops20h 20m

Kaunas

Mon 5/11

9:40 pm-7:55 pm

2 stops29h 15m

$844

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Sun 6/14

5:50 am-12:35 am

3 stops35h 45m

Kaunas

Sat 6/20

7:40 pm-5:40 pm

2 stops29h 00m

$874
Quickest round-trip

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Mon 5/4

5:25 pm-1:30 pm

1 stop13h 05m

Kaunas

Tue 5/12

6:50 am-2:55 pm

1 stop15h 05m

$962

BostonKaunas

BOS - KUN

BOSKUN

Boston Logan Intl

Mon 5/4

9:50 pm-12:35 am

3 stops43h 45m

Kaunas

Mon 5/11

5:35 am-7:55 pm

3 stops45h 20m

$988

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Kaunas from

How to get the cheapest flight ticket from Boston to Kaunas

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 airlines fly to Kaunas?

Scandinavian Airlines, Lufthansa and KLM are the top three most popular airlines that fly to Kaunas from Boston according to our data. Scandinavian Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Kaunas. Keep in mind that there are 6 different airlines that fly to Kaunas on a routine basis, so you have a few additional options to choose from.

When to book flights from Boston to Kaunas

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Kaunas according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Kaunas (BOS to KUN) flight deals and tips

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

Fastest flight time

35h 45m

Direct flights

None
The fastest flight from Boston to Kaunas takes 35h 45m
There are no direct flights from Boston to Kaunas. There are no popular flight routes from Boston to Kaunas.
Search flight deals

  • How far is Boston Logan Intl to Kaunas by plane?

    The straight-line distance from Boston Logan Intl to Kaunas is 4076.0 mi. In terms of flight time, this usually takes a little over 35h 45m.

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Kaunas Airport.

  • What documentation or ID do you need to fly to Kaunas Airport?

    The necessary travel and health documents for your Kaunas Airport 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.

Why use momondo?

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

It is quick and easy to find Boston to Kaunas flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Kaunas that suits you.

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

momondo does allow users to show only those flights to Kaunas from Boston which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Boston to Kaunas?

Once all potential Boston to Kaunas flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Kaunas, momondo offers a useful price alert feature which will track prices for flights to Kaunas from Boston and alert you when they change.

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