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Cheap flights from Boston to Košice from $871

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 9/5. 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

Find the cheapest flights from Boston to Košice

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:15 pm - 11:20 pm
BOS
-
KSC
46h 05m
2 stops
Multiple Airlines Logo
5:25 am - 1:50 pm
KSC
-
BOS
14h 25m
1 stop
$871Multiple Airlines
Sat, Sep 5 - Thu, Sep 24
Multiple Airlines Logo
7:15 pm - 11:20 pm
BOS
-
KSC
46h 05m
2 stops
Multiple Airlines Logo
5:25 am - 9:50 am
KSC
-
BOS
34h 25m
2 stops
$874Multiple Airlines
Sat, Sep 5 - Thu, Sep 24
Austrian Airlines Logo
5:10 pm - 2:00 pm
BOS
-
KSC
14h 50m
1 stop
Austrian Airlines Logo
5:25 am - 1:50 pm
KSC
-
BOS
14h 25m
1 stop
$898Austrian Airlines
Sat, Sep 5 - Thu, Sep 24
Multiple Airlines Logo
10:50 am - 4:20 pm
BOS
-
KSC
23h 30m
2 stops
Multiple Airlines Logo
10:05 pm - 5:50 pm
KSC
-
BOS
24h 45m
2 stops
$909Multiple Airlines
Thu, Oct 15 - Sun, Oct 25
Multiple Airlines Logo
10:40 am - 4:20 pm
BOS
-
KSC
23h 40m
3 stops
Multiple Airlines Logo
10:05 pm - 5:50 pm
KSC
-
BOS
24h 45m
2 stops
$911Multiple Airlines
Thu, Oct 15 - Sun, Oct 25
SWISS Logo
9:40 pm - 6:55 pm
BOS
-
KSC
15h 15m
1 stop
SWISS Logo
7:40 pm - 7:55 pm
KSC
-
BOS
30h 15m
1 stop
$939SWISS
Sun, Aug 30 - Mon, Sep 21
Multiple Airlines Logo
9:40 pm - 6:55 pm
BOS
-
KSC
15h 15m
1 stop
Multiple Airlines Logo
7:40 pm - 4:05 pm
KSC
-
BOS
26h 25m
2 stops
$946Multiple Airlines
Sun, Aug 30 - Mon, Sep 21
Multiple Airlines Logo
10:40 am - 4:20 pm
BOS
-
KSC
23h 40m
3 stops
Multiple Airlines Logo
10:05 pm - 7:02 pm
KSC
-
BOS
25h 57m
3 stops
$957Multiple Airlines
Thu, Oct 15 - Sun, Oct 25
Multiple Airlines Logo
8:05 pm - 11:20 pm
BOS
-
KSC
21h 15m
2 stops
Multiple Airlines Logo
2:45 pm - 7:19 pm
KSC
-
BOS
34h 34m
2 stops
$969Multiple Airlines
Sun, Aug 30 - Mon, Sep 21
Multiple Airlines Logo
5:10 pm - 11:20 pm
BOS
-
KSC
24h 10m
1 stop
Multiple Airlines Logo
2:55 pm - 9:58 am
KSC
-
BOS
48h 03m
2 stops
$972Multiple Airlines
Thu, Oct 15 - Sun, Oct 25

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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 July 2, 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

Cheapest round-trip

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sat 9/5

7:15 pm-11:20 pm

2 stops46h 05m

Košice Barca

Thu 9/24

5:25 am-1:50 pm

1 stop14h 25m

$871

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sat 9/5

7:15 pm-11:20 pm

2 stops46h 05m

Košice Barca

Thu 9/24

5:25 am-9:50 am

2 stops34h 25m

$874
Quickest round-trip

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sat 9/5

5:10 pm-2:00 pm

1 stop14h 50m

Košice Barca

Thu 9/24

5:25 am-1:50 pm

1 stop14h 25m

$898

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Thu 10/15

10:50 am-4:20 pm

2 stops23h 30m

Košice Barca

Sun 10/25

10:05 pm-5:50 pm

2 stops24h 45m

$909

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Thu 10/15

10:40 am-4:20 pm

3 stops23h 40m

Košice Barca

Sun 10/25

10:05 pm-5:50 pm

2 stops24h 45m

$911

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sun 8/30

9:40 pm-6:55 pm

1 stop15h 15m

Košice Barca

Mon 9/21

7:40 pm-7:55 pm

1 stop30h 15m

$939

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sun 8/30

9:40 pm-6:55 pm

1 stop15h 15m

Košice Barca

Mon 9/21

7:40 pm-4:05 pm

2 stops26h 25m

$946

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Thu 10/15

10:40 am-4:20 pm

3 stops23h 40m

Košice Barca

Sun 10/25

10:05 pm-7:02 pm

3 stops25h 57m

$957

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sun 8/30

8:05 pm-11:20 pm

2 stops21h 15m

Košice Barca

Mon 9/21

2:45 pm-7:19 pm

2 stops34h 34m

$969

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Thu 10/15

5:10 pm-11:20 pm

1 stop24h 10m

Košice Barca

Sun 10/25

2:55 pm-9:58 am

2 stops48h 03m

$972

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

37h 55m

Direct flights

None
The fastest flight from Boston to Košice takes 37h 55m
There are no direct flights from Boston to Košice. There are no popular flight routes from Boston to Košice.
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Frequently asked questions about flying from Boston to Košice

  • 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 37h 55m, 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.

Frequently asked questions about flying from Boston to Košice

  • 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.

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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