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Cheap flights from Boston to Slovakia from $671

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 Slovakia departing on 3/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Boston to Slovakia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:35 am - 6:55 pm
BOS
-
BTS
25h 20m
2 stops
Multiple Airlines Logo
9:40 am - 3:35 pm
BTS
-
BOS
34h 55m
2 stops
$671Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
11:35 am - 6:55 pm
BOS
-
BTS
25h 20m
2 stops
Multiple Airlines Logo
9:40 am - 1:55 pm
BTS
-
BOS
33h 15m
3 stops
$706Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
SWISS Logo
5:20 pm - 2:05 pm
BOS
-
KSC
14h 45m
1 stop
SWISS Logo
7:40 pm - 3:10 pm
KSC
-
BOS
25h 30m
1 stop
$712SWISS
Tue, Jul 28 - Mon, Aug 31
Multiple Airlines Logo
5:10 pm - 8:45 pm
BOS
-
BTS
21h 35m
1 stop
Multiple Airlines Logo
7:40 pm - 9:55 pm
BTS
-
BOS
31h 15m
1 stop
$737Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
7:25 pm - 1:00 am
BOS
-
BTS
23h 35m
2 stops
Multiple Airlines Logo
7:40 pm - 9:55 pm
BTS
-
BOS
31h 15m
1 stop
$757Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
SWISS Logo
5:20 pm - 9:15 am
BOS
-
KSC
9h 55m
1 stop
SWISS Logo
7:40 pm - 7:55 pm
KSC
-
BOS
30h 15m
1 stop
$762SWISS
Thu, Jul 30 - Mon, Aug 31
Austrian Airlines Logo
11:00 am - 11:20 pm
BOS
-
KSC
30h 20m
2 stops
Austrian Airlines Logo
2:45 pm - 1:50 pm
KSC
-
BOS
29h 05m
1 stop
$768Austrian Airlines
Thu, Jul 30 - Tue, Sep 1
Austrian Airlines Logo
11:00 am - 11:20 pm
BOS
-
KSC
30h 20m
2 stops
Austrian Airlines Logo
2:45 pm - 1:50 pm
KSC
-
BOS
29h 05m
1 stop
$769Austrian Airlines
Thu, Jul 30 - Tue, Sep 1
Lufthansa Logo
8:05 pm - 2:00 pm
BOS
-
KSC
11h 55m
2 stops
Lufthansa Logo
5:25 am - 8:10 pm
KSC
-
BOS
20h 45m
2 stops
$782Lufthansa
Sat, Aug 1 - Tue, Sep 1
Lufthansa Logo
8:05 pm - 11:20 pm
BOS
-
KSC
21h 15m
2 stops
Lufthansa Logo
5:25 am - 8:10 pm
KSC
-
BOS
20h 45m
2 stops
$789Lufthansa
Tue, Jul 28 - Tue, Sep 1

SWISS flights from Boston to Slovakia

Our best SWISS deals on Boston to Slovakia flight tickets
SWISS
Jul 28
BOS5:20 pmBoston Logan Intl
14h 45m
1 stop
KSC2:05 pmKošice Barca
Aug 31
KSC7:40 pmKošice Barca
25h 30m
1 stop
BOS3:10 pmBoston Logan Intl
$712
SWISS
Jul 30
BOS5:20 pmBoston Logan Intl
9h 55m
1 stop
KSC9:15 amKošice Barca
Aug 31
KSC7:40 pmKošice Barca
30h 15m
1 stop
BOS7:55 pmBoston Logan Intl
$762
SWISS
Jul 28
BOS9:40 pmBoston Logan Intl
10h 25m
1 stop
KSC2:05 pmKošice Barca
Aug 29
KSC9:55 amKošice Barca
11h 15m
1 stop
BOS3:10 pmBoston Logan Intl
$772

Austrian Airlines flights from Boston to Slovakia

Our best Austrian Airlines deals on Boston to Slovakia flight tickets
Austrian Airlines
Jul 30
BOS11:00 amBoston Logan Intl
30h 20m
2 stops
KSC11:20 pmKošice Barca
Sep 1
KSC2:45 pmKošice Barca
29h 05m
1 stop
BOS1:50 pmBoston Logan Intl
$768
Austrian Airlines
Jul 30
BOS11:00 amBoston Logan Intl
30h 20m
2 stops
KSC11:20 pmKošice Barca
Sep 1
KSC2:45 pmKošice Barca
29h 05m
1 stop
BOS1:50 pmBoston Logan Intl
$769
Austrian Airlines
Jul 30
BOS5:10 pmBoston Logan Intl
24h 10m
1 stop
KSC11:20 pmKošice Barca
Sep 1
KSC2:45 pmKošice Barca
29h 05m
1 stop
BOS1:50 pmBoston Logan Intl
$783

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Slovakia 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 February 4, 2026.
Use the filters below to find and compare flights from Boston to Slovakia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonBratislava

BOS - BTS

BOSBTS

Boston Logan Intl

Wed 3/4

11:35 am-6:55 pm

2 stops25h 20m

Bratislava - M. R. Štefánik

Wed 3/11

9:40 am-3:35 pm

2 stops34h 55m

$671

BostonBratislava

BOS - BTS

BOSBTS

Boston Logan Intl

Wed 3/4

11:35 am-6:55 pm

2 stops25h 20m

Bratislava - M. R. Štefánik

Wed 3/11

9:40 am-1:55 pm

3 stops33h 15m

$706

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 7/28

5:20 pm-2:05 pm

1 stop14h 45m

Košice Barca

Mon 8/31

7:40 pm-3:10 pm

1 stop25h 30m

$712

BostonBratislava

BOS - BTS

BOSBTS

Boston Logan Intl

Wed 3/4

5:10 pm-8:45 pm

1 stop21h 35m

Bratislava - M. R. Štefánik

Wed 3/11

7:40 pm-9:55 pm

1 stop31h 15m

$737

BostonBratislava

BOS - BTS

BOSBTS

Boston Logan Intl

Wed 3/4

7:25 pm-1:00 am

2 stops23h 35m

Bratislava - M. R. Štefánik

Wed 3/11

7:40 pm-9:55 pm

1 stop31h 15m

$757

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Thu 7/30

5:20 pm-9:15 am

1 stop9h 55m

Košice Barca

Mon 8/31

7:40 pm-7:55 pm

1 stop30h 15m

$762

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Thu 7/30

11:00 am-11:20 pm

2 stops30h 20m

Košice Barca

Tue 9/1

2:45 pm-1:50 pm

1 stop29h 05m

$768

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Thu 7/30

11:00 am-11:20 pm

2 stops30h 20m

Košice Barca

Tue 9/1

2:45 pm-1:50 pm

1 stop29h 05m

$769

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Sat 8/1

8:05 pm-2:00 pm

2 stops11h 55m

Košice Barca

Tue 9/1

5:25 am-8:10 pm

2 stops20h 45m

$782

BostonKošice

BOS - KSC

BOSKSC

Boston Logan Intl

Tue 7/28

8:05 pm-11:20 pm

2 stops21h 15m

Košice Barca

Tue 9/1

5:25 am-8:10 pm

2 stops20h 45m

$789

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap Boston to Slovakia flight deals and tips

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

Fastest flight time

17h 10m

Direct flights

None
The fastest flight from Boston to Slovakia takes 17h 10m
There are no direct flights from Boston to Slovakia. There are no popular flight routes from Boston to Slovakia.
Search flight deals

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

    Prices for flights from Boston Logan Intl Airport to Slovakia are updated daily.

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

    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 Slovakia.

  • What documentation or ID do you need to fly to Slovakia?

    The necessary travel and health documents for your Slovakia 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 Slovakia?

    Search flight deals from Boston to Slovakia. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Boston to Slovakia 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.

Why use momondo?

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

Finding the right flight to Slovakia 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 Slovakia quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Slovakia from Boston with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Slovakia from Boston.

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

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

An easier way to manage your Slovakia trip

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Fri 3/6
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Find better results for your trip to Slovakia

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