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$348+ Cheap flights from Košice (KSC) to Boston (BOS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
KSC — BOS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Košice to Boston

Cheapest flights from Košice to Boston
Explore the most affordable flight options available from Košice to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Austrian Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:20 am
KSC
-
BOS
1 stop14h 45m
Austrian Airlines
Tue 2/176:25 pm
BOS
-
KSC
1 stop13h 50m
Austrian Airlines
Deal found 1/27$663
This Lufthansa deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:20 am
KSC
-
BOS
2 stops14h 15m
Lufthansa
Tue 2/178:40 pm
BOS
-
KSC
2 stops20h 35m
Lufthansa
Deal found 1/27$704
This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/139:45 am
KSC
-
BOS
2 stops14h 50m
Multiple Airlines
Tue 2/176:25 pm
BOS
-
KSC
3 stops23h 50m
Multiple Airlines
Deal found 1/27$1,023
This LOT deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LOT is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:15 am
KSC
-
BOS
2 stops34h 00m
Multiple Airlines
Sat 3/216:07 pm
BOS
-
KSC
2 stops25h 03m
Multiple Airlines
Deal found 1/27$1,646

Find flight deals from Košice to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Košice (KSC) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 29, 2026.

Round-trip from

$663
(Austrian Airlines)

One-way from

$348
(Kiwi.com)
From Košice Barca to Boston Logan Intl
Search Deals
One-way flight from Košice Barca to Boston Logan Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Košice to Boston 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, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Košice to Boston that are best for you.

Fly from

Košice

Fly to

Boston

Route

Depart

Return

Price

KošiceBoston

KSC - BOS

KSCBOS

Košice Barca

Fri 2/13

5:20 am-2:05 pm

1 stop14h 45m

Boston Logan Intl

Tue 2/17

6:25 pm-2:15 pm

1 stop13h 50m

$663

KošiceBoston

KSC - BOS

KSCBOS

Košice Barca

Fri 2/13

5:20 am-1:35 pm

2 stops14h 15m

Boston Logan Intl

Tue 2/17

8:40 pm-11:15 pm

2 stops20h 35m

$704

KošiceBoston

KSC - BOS

KSCBOS

Košice Barca

Fri 2/13

9:45 am-6:35 pm

2 stops14h 50m

Boston Logan Intl

Tue 2/17

6:25 pm-12:15 am

3 stops23h 50m

$1,023

KošiceBoston

KSC - BOS

KSCBOS

Košice Barca

Sat 3/7

5:15 am-9:15 am

2 stops34h 00m

Boston Logan Intl

Sat 3/21

6:07 pm-12:10 am

2 stops25h 03m

$1,646

KošiceBoston

KSC - BOS

KSCBOS

Košice Barca

Fri 2/13

9:50 pm-8:55 pm

2 stops29h 05m

$348

KošiceBoston

KSC - BOS

KSCBOS

Košice Barca

Fri 2/13

5:20 am-2:05 pm

1 stop14h 45m

$2,966

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Best time to book a flight from Košice to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Košice with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated January 29, 2026.
See what other customers who have flown with SWISS from Košice to Boston have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.6
Good
1,864 reviews

Overall

7.6

Crew

8.3

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Joanne,Sep 2025

OPO - ZRH

The seats were very cramped, even though I paid for an upgraded seat. The seats were also hard, and needed new padding. This made is made it very challenging for this 11 hour flight. The foot was alright. The crew were excellent, and the movie selection was very good. The experience was so challenging what my husband says he does not want to fly to Europe any more.
SWISS
7.6
Good
1,864 reviews
SWISS
7.6
Good
1,864 reviews

Overall

7.6

Crew

8.3

Comfort

7.4

Boarding

7.7

Entertainment

6.8

Food

7.1

Reviews

1 / 20
2.0
Mediocre

Joanne,Sep 2025

OPO - ZRH

The seats were very cramped, even though I paid for an upgraded seat. The seats were also hard, and needed new padding. This made is made it very challenging for this 11 hour flight. The foot was alright. The crew were excellent, and the movie selection was very good. The experience was so challenging what my husband says he does not want to fly to Europe any more.

Related info for your journey

Find useful and relevant information for your journey from Košice to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Košice to Boston?

    Airlines like Austrian Airlines and Lufthansa fly from Košice to Boston in about 14h 15m. The time it takes to get you to your destination can typically vary by up to 30m. The distance from Košice to Boston is about 4203 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Košice to Boston that include hotel bookings?

    Yes. In addition to deals on Košice to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Košice to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Košice to Boston.

  • Can I find deals for business class flights from Košice to Boston?

    Yes. Cheapflights offers flight deals from Košice to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Medford
Cambridge
Hampton Beach
Watertown
Seekonk
Brockton
Warwick
Seabrook
Cranston
Lincoln
Smithfield
Peabody
Quincy
York Beach
Londonderry
Swansea
Old Orchard Beach
Waltham
Lowell
Chelsea

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Košice to Boston

See prices for flight routes from nearby airports that may be better suited for you.
Bratislava to Boston flights

Top airline flying from Košice to Boston

Discover the top airline that operate flights from Košice to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$555Average$707FlexibilityNo cancel feeOn-time79%

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