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Cheap flights from Boston to Košice from $549

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 Košice departing on 10/29. 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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Find the cheapest flights from Boston to Košice (BOS-KSC)

Cheap round-trip flights

Logo
10:50 pm - 9:00 amBOS-KSC
29h 10m1 stop
Logo
5:20 am - 5:15 pmKSC-BOS
17h 55m2 stops
$549
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Wed, Oct 29 - Tue, Nov 11
Logo
9:50 pm - 1:55 pmBOS-KSC
10h 05m1 stop
Logo
2:55 pm - 2:05 pmKSC-BOS
29h 10m1 stop
$553
Find Deal
Tue, Nov 4 - Mon, Nov 10
Austrian Airlines Logo
1:30 pm - 2:15 pmBOS-KSC
18h 45m2 stops
Austrian Airlines Logo
2:55 pm - 2:05 pmKSC-BOS
29h 10m1 stop
$560Austrian Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
Austrian Airlines Logo
6:25 pm - 2:15 pmBOS-KSC
13h 50m1 stop
Austrian Airlines Logo
2:55 pm - 2:05 pmKSC-BOS
29h 10m1 stop
$563Austrian Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
Logo
9:50 pm - 1:55 pmBOS-KSC
10h 05m1 stop
Logo
2:55 pm - 5:15 pmKSC-BOS
32h 20m2 stops
$564
Find Deal
Tue, Nov 4 - Mon, Nov 10
Logo
9:50 pm - 1:55 pmBOS-KSC
10h 05m1 stop
Logo
5:20 am - 2:05 pmKSC-BOS
14h 45m1 stop
$565
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Tue, Nov 4 - Tue, Nov 11
SWISS Logo
9:50 pm - 1:55 pmBOS-KSC
10h 05m1 stop
SWISS Logo
7:40 pm - 8:20 pmKSC-BOS
30h 40m1 stop
$568SWISS
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Tue, Nov 4 - Mon, Nov 10
SWISS Logo
9:50 pm - 1:55 pmBOS-KSC
10h 05m1 stop
SWISS Logo
7:40 pm - 8:20 pmKSC-BOS
30h 40m1 stop
$573SWISS
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Tue, Nov 11 - Mon, Nov 24
Lufthansa Logo
8:40 pm - 11:15 pmBOS-KSC
20h 35m2 stops
Lufthansa Logo
5:20 am - 6:35 pmKSC-BOS
43h 15m2 stops
$636Lufthansa
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Sun, Nov 9 - Tue, Nov 18
Lufthansa Logo
8:40 pm - 2:15 pmBOS-KSC
11h 35m2 stops
Lufthansa Logo
2:55 pm - 1:25 pmKSC-BOS
52h 30m2 stops
$663Lufthansa
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Sun, Nov 2 - Sun, Nov 9

Austrian Airlines flights from Boston to Košice

Our best Austrian Airlines deals on Boston to Košice flight tickets
Austrian Airlines
Nov 4
BOS1:30 pmBoston Logan Intl
18h 45m
2 stops
KSC2:15 pmKošice Barca
Nov 10
KSC2:55 pmKošice Barca
29h 10m
1 stop
BOS2:05 pmBoston Logan Intl
$560
Find similar
Austrian Airlines
Nov 4
BOS6:25 pmBoston Logan Intl
13h 50m
1 stop
KSC2:15 pmKošice Barca
Nov 10
KSC2:55 pmKošice Barca
29h 10m
1 stop
BOS2:05 pmBoston Logan Intl
$563
Find similar
Austrian Airlines
Oct 29
BOS11:59 amBoston Logan Intl
21h 16m
2 stops
KSC2:15 pmKošice Barca
Nov 11
KSC5:20 amKošice Barca
14h 45m
1 stop
BOS2:05 pmBoston Logan Intl
$575
Find similar

SWISS flights from Boston to Košice

Our best SWISS deals on Boston to Košice flight tickets
SWISS
Nov 4
BOS9:50 pmBoston Logan Intl
10h 05m
1 stop
KSC1:55 pmKošice Barca
Nov 10
KSC7:40 pmKošice Barca
30h 40m
1 stop
BOS8:20 pmBoston Logan Intl
$568
Find similar
SWISS
Nov 11
BOS9:50 pmBoston Logan Intl
10h 05m
1 stop
KSC1:55 pmKošice Barca
Nov 24
KSC7:40 pmKošice Barca
30h 40m
1 stop
BOS8:20 pmBoston Logan Intl
$573
Find similar
SWISS
Nov 5
BOS9:50 pmBoston Logan Intl
29h 10m
1 stop
KSC9:00 amKošice Barca
Nov 10
KSC7:40 pmKošice Barca
30h 40m
1 stop
BOS8:20 pmBoston Logan Intl
$609
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Košice 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 13, 2025.
Use the filters below to find and compare flights from Boston to Košice that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Wed 10/29

10:50 pm-9:00 am

1 stop29h 10m

Košice Barca

Tue 11/11

5:20 am-5:15 pm

2 stops17h 55m

$549

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 11/4

9:50 pm-1:55 pm

1 stop10h 05m

Košice Barca

Mon 11/10

2:55 pm-2:05 pm

1 stop29h 10m

$553

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 11/4

1:30 pm-2:15 pm

2 stops18h 45m

Košice Barca

Mon 11/10

2:55 pm-2:05 pm

1 stop29h 10m

$560

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 11/4

6:25 pm-2:15 pm

1 stop13h 50m

Košice Barca

Mon 11/10

2:55 pm-2:05 pm

1 stop29h 10m

$563

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 11/4

9:50 pm-1:55 pm

1 stop10h 05m

Košice Barca

Mon 11/10

2:55 pm-5:15 pm

2 stops32h 20m

$564

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 11/4

9:50 pm-1:55 pm

1 stop10h 05m

Košice Barca

Tue 11/11

5:20 am-2:05 pm

1 stop14h 45m

$565

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 11/4

9:50 pm-1:55 pm

1 stop10h 05m

Košice Barca

Mon 11/10

7:40 pm-8:20 pm

1 stop30h 40m

$568

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 11/11

9:50 pm-1:55 pm

1 stop10h 05m

Košice Barca

Mon 11/24

7:40 pm-8:20 pm

1 stop30h 40m

$573

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sun 11/9

8:40 pm-11:15 pm

2 stops20h 35m

Košice Barca

Tue 11/18

5:20 am-6:35 pm

2 stops43h 15m

$636

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sun 11/2

8:40 pm-2:15 pm

2 stops11h 35m

Košice Barca

Sun 11/9

2:55 pm-1:25 pm

2 stops52h 30m

$663

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Košice from

How to get the cheapest flight ticket from Boston to Košice

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 day to depart on your flight to Košice?

According to our data, Friday is the cheapest day to fly to Košice from Boston. The lowest ticket price found for a Friday departure recently was $725. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Boston to Košice for around $1,104.

What is the cheapest time of day to depart on your flight to Košice?

Flying to Košice from Boston in the evening is the least expensive time of day to depart. momondo users have found prices as low as $824 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to Košice is in the afternoon when prices are around $1,004.

When to book flights from Boston to Košice

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

Cheap Boston to Košice (BOS to KSC) flight deals and tips

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

Best Price Found

$549

Fastest flight time

10h 05m

Direct flights

None

Airports in Košice

1 airport
The best flight deal from Boston to Košice found on momondo in the last 72 hours is $549
The fastest flight from Boston to Košice takes 10h 05m
There are no direct flights from Boston to Košice. Popular non-direct route for this connection is Boston Logan Intl Airport - Košice Barca Airport.
There is 1 airport near Košice: Košice Barca (KSC)
Search flight deals

  • How far is Boston Logan Intl to Košice Barca by plane?

    The distance between Boston Logan Intl and Košice Barca is about 4203.7 mi. Flights usually cover this in 10h 05m, depending on flying conditions and air traffic around both airports.

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

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

  • How old do you have to be to fly from Boston Logan Intl Airport to Košice Barca 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 Košice Barca Airport.

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

    The necessary travel and health documents for your Košice Barca 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.

Traveling to a place near Košice?

Book flights to Košice if you plan to visit one of these locations
Prešov

Why use momondo?

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

Finding the right flight to Košice from Boston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Košice quick and easy, saving you time and money.

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

All flight searches from Boston to Košice on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Boston and Košice by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Boston to Košice now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Košice and let you know when they change.

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