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Cheap flights from Boston to Košice from $305

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 Košice departing on 3/28. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
10:00 pm - 9:15 am
BOS
-
KSC
29h 15m
1 stop
SWISS Logo
2:50 pm - 3:10 pm
KSC
-
BOS
30h 20m
1 stop
$806SWISS
mié., abr. 1 - mié., abr. 8
Multiple Airlines Logo
3:35 pm - 2:00 pm
BOS
-
KSC
16h 25m
2 stops
Multiple Airlines Logo
7:40 pm - 7:55 pm
KSC
-
BOS
30h 15m
1 stop
$813Multiple Airlines
lun., mar. 30 - lun., abr. 6
Multiple Airlines Logo
3:35 pm - 2:00 pm
BOS
-
KSC
16h 25m
2 stops
Multiple Airlines Logo
2:45 pm - 6:19 pm
KSC
-
BOS
33h 34m
2 stops
$826Multiple Airlines
lun., mar. 30 - lun., abr. 6
Multiple Airlines Logo
3:49 pm - 2:30 pm
BOS
-
KSC
40h 41m
3 stops
Multiple Airlines Logo
12:30 pm - 10:35 pm
KSC
-
BOS
16h 05m
2 stops
$852Multiple Airlines
lun., mar. 30 - lun., abr. 6
Multiple Airlines Logo
8:05 pm - 2:00 pm
BOS
-
KSC
35h 55m
2 stops
Multiple Airlines Logo
2:45 pm - 6:19 pm
KSC
-
BOS
33h 34m
2 stops
$858Multiple Airlines
mié., abr. 1 - mié., abr. 8
Multiple Airlines Logo
8:50 pm - 2:30 pm
BOS
-
KSC
35h 40m
3 stops
Multiple Airlines Logo
12:30 pm - 6:50 pm
KSC
-
BOS
36h 20m
3 stops
$881Multiple Airlines
lun., mar. 30 - lun., abr. 6
Multiple Airlines Logo
11:00 pm - 9:15 am
BOS
-
KSC
28h 15m
3 stops
Multiple Airlines Logo
2:50 pm - 6:50 pm
KSC
-
BOS
34h 00m
3 stops
$1,079Multiple Airlines
mié., abr. 1 - mié., abr. 8
Multiple Airlines Logo
5:00 pm - 11:20 pm
BOS
-
KSC
48h 20m
2 stops
Multiple Airlines Logo
5:25 am - 6:22 pm
KSC
-
BOS
18h 57m
2 stops
$1,174Multiple Airlines
sáb., jul. 4 - sáb., jul. 18
Austrian Airlines Logo
5:10 pm - 2:00 pm
BOS
-
KSC
14h 50m
1 stop
Austrian Airlines Logo
5:25 am - 4:38 pm
KSC
-
BOS
17h 13m
2 stops
$1,243Austrian Airlines
sáb., jul. 4 - sáb., jul. 18
LOT Logo
5:00 pm - 12:10 pm
BOS
-
KSC
37h 10m
2 stops
LOT Logo
5:40 pm - 7:41 am
KSC
-
BOS
44h 01m
2 stops
$1,422LOT
dom., abr. 26 - jue., abr. 30

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 febrero 17, 2026.
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

mié. 4/1

10:00 pm-9:15 am

1 stop29h 15m

Košice Barca

mié. 4/8

2:50 pm-3:10 pm

1 stop30h 20m

$806

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

lun. 3/30

3:35 pm-2:00 pm

2 stops16h 25m

Košice Barca

lun. 4/6

7:40 pm-7:55 pm

1 stop30h 15m

$813

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

lun. 3/30

3:35 pm-2:00 pm

2 stops16h 25m

Košice Barca

lun. 4/6

2:45 pm-6:19 pm

2 stops33h 34m

$826

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

lun. 3/30

3:49 pm-2:30 pm

3 stops40h 41m

Košice Barca

lun. 4/6

12:30 pm-10:35 pm

2 stops16h 05m

$852

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

mié. 4/1

8:05 pm-2:00 pm

2 stops35h 55m

Košice Barca

mié. 4/8

2:45 pm-6:19 pm

2 stops33h 34m

$858

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

lun. 3/30

8:50 pm-2:30 pm

3 stops35h 40m

Košice Barca

lun. 4/6

12:30 pm-6:50 pm

3 stops36h 20m

$881

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

mié. 4/1

11:00 pm-9:15 am

3 stops28h 15m

Košice Barca

mié. 4/8

2:50 pm-6:50 pm

3 stops34h 00m

$1,079

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

sáb. 7/4

5:00 pm-11:20 pm

2 stops48h 20m

Košice Barca

sáb. 7/18

5:25 am-6:22 pm

2 stops18h 57m

$1,174

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

sáb. 7/4

5:10 pm-2:00 pm

1 stop14h 50m

Košice Barca

sáb. 7/18

5:25 am-4:38 pm

2 stops17h 13m

$1,243

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

dom. 4/26

5:00 pm-12:10 pm

2 stops37h 10m

Košice Barca

jue. 4/30

5:40 pm-7:41 am

2 stops44h 01m

$1,422

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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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

Fastest flight time

29h 15m

Direct flights

None
The fastest flight from Boston to Košice takes 29h 15m
There are no direct flights from Boston to Košice. There are no popular flight routes from Boston to Košice.
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 29h 15m, 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.

  • How do I get Price Alerts for flights from Boston to Košice?

    Price Alerts will notify you by email when the price for flights to Košice from Boston decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Boston to Košice with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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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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