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Cheap flights from Boston to Klagenfurt from $915

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 Klagenfurt departing on 9/9. 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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Find the cheapest flights from Boston to Klagenfurt

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:35 pm - 6:00 pm
BOS
-
KLU
20h 25m
2 stops
Multiple Airlines Logo
2:50 pm - 5:25 pm
KLU
-
BOS
32h 35m
2 stops
$1,045Multiple Airlines
Sun, Aug 2 - Wed, Jan 27
Multiple Airlines Logo
10:45 am - 2:50 pm
BOS
-
KLU
22h 05m
3 stops
Multiple Airlines Logo
3:00 pm - 3:40 pm
KLU
-
BOS
30h 40m
2 stops
$1,576Multiple Airlines
Sun, Jun 14 - Sun, Jun 21
Multiple Airlines Logo
9:40 pm - 2:00 pm
BOS
-
KLU
34h 20m
3 stops
Multiple Airlines Logo
3:00 pm - 8:20 pm
KLU
-
BOS
35h 20m
3 stops
$1,692Multiple Airlines
Sun, Jun 14 - Sun, Jun 21
Multiple Airlines Logo
11:30 pm - 2:00 pm
BOS
-
KLU
32h 30m
2 stops
Multiple Airlines Logo
3:05 pm - 1:40 pm
KLU
-
BOS
28h 35m
1 stop
$1,785Multiple Airlines
Sun, Jun 14 - Sun, Jun 21
Lufthansa Logo
8:05 pm - 2:50 pm
BOS
-
KLU
12h 45m
2 stops
Lufthansa Logo
3:00 pm - 3:40 pm
KLU
-
BOS
54h 40m
2 stops
$1,820Lufthansa
Sun, Jun 14 - Sun, Jun 21
Multiple Airlines Logo
9:35 am - 3:10 pm
BOS
-
KLU
23h 35m
3 stops
Multiple Airlines Logo
2:50 pm - 10:00 pm
KLU
-
BOS
37h 10m
3 stops
$3,266Multiple Airlines
Sun, Aug 2 - Wed, Jan 27
Multiple Airlines Logo
5:45 pm - 3:10 pm
BOS
-
KLU
15h 25m
2 stops
Multiple Airlines Logo
2:50 pm - 10:00 pm
KLU
-
BOS
37h 10m
3 stops
$3,316Multiple Airlines
Sun, Aug 2 - Wed, Jan 27
Austrian Airlines Logo
10:30 am - 2:50 pm
BOS
-
KLU
22h 20m
2 stops
Austrian Airlines Logo
3:00 pm - 1:50 pm
KLU
-
BOS
28h 50m
1 stop
$6,765Austrian Airlines
Sun, May 31 - Sun, Jun 7
Multiple Airlines Logo
8:05 pm - 2:50 pm
BOS
-
KLU
12h 45m
2 stops
Multiple Airlines Logo
3:00 pm - 7:14 pm
KLU
-
BOS
34h 14m
2 stops
$7,198Multiple Airlines
Sun, May 31 - Sun, Jun 7
Multiple Airlines Logo
10:30 am - 2:50 pm
BOS
-
KLU
22h 20m
2 stops
Multiple Airlines Logo
3:00 pm - 3:40 pm
KLU
-
BOS
30h 40m
3 stops
$11,202Multiple Airlines
Sun, May 31 - Sun, Jun 7

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Klagenfurt 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 May 5, 2026.
Use the filters below to find and compare flights from Boston to Klagenfurt that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 8/2

3:35 pm-6:00 pm

2 stops20h 25m

Klagenfurt

Wed 1/27

2:50 pm-5:25 pm

2 stops32h 35m

$1,045

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 6/14

10:45 am-2:50 pm

3 stops22h 05m

Klagenfurt

Sun 6/21

3:00 pm-3:40 pm

2 stops30h 40m

$1,576

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 6/14

9:40 pm-2:00 pm

3 stops34h 20m

Klagenfurt

Sun 6/21

3:00 pm-8:20 pm

3 stops35h 20m

$1,692

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 6/14

11:30 pm-2:00 pm

2 stops32h 30m

Klagenfurt

Sun 6/21

3:05 pm-1:40 pm

1 stop28h 35m

$1,785

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 6/14

8:05 pm-2:50 pm

2 stops12h 45m

Klagenfurt

Sun 6/21

3:00 pm-3:40 pm

2 stops54h 40m

$1,820

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 8/2

9:35 am-3:10 pm

3 stops23h 35m

Klagenfurt

Wed 1/27

2:50 pm-10:00 pm

3 stops37h 10m

$3,266

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 8/2

5:45 pm-3:10 pm

2 stops15h 25m

Klagenfurt

Wed 1/27

2:50 pm-10:00 pm

3 stops37h 10m

$3,316

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 5/31

10:30 am-2:50 pm

2 stops22h 20m

Klagenfurt

Sun 6/7

3:00 pm-1:50 pm

1 stop28h 50m

$6,765
Quickest round-trip

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 5/31

8:05 pm-2:50 pm

2 stops12h 45m

Klagenfurt

Sun 6/7

3:00 pm-7:14 pm

2 stops34h 14m

$7,198

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Sun 5/31

10:30 am-2:50 pm

2 stops22h 20m

Klagenfurt

Sun 6/7

3:00 pm-3:40 pm

3 stops30h 40m

$11,202

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Klagenfurt from

How to get the cheapest flight ticket from Boston to Klagenfurt

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 airline that flies from Boston Logan Intl to Klagenfurt?

Air Canada and Austrian Airlines are the most popular carriers operating from Boston Logan Intl to Klagenfurt

When to book flights from Boston to Klagenfurt

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

Cheap Boston to Klagenfurt (BOS to KLU) flight deals and tips

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

Fastest flight time

20h 25m

Direct flights

None
The fastest flight from Boston to Klagenfurt takes 20h 25m
There are no direct flights from Boston to Klagenfurt. There are no popular flight routes from Boston to Klagenfurt.
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Frequently asked questions about flying from Boston to Klagenfurt

  • How far is Boston Logan Intl to Klagenfurt by plane?

    A flight from Boston Logan Intl to Klagenfurt will travel around 4000.6 mi. 20h 25m is a normal flight duration for this route.

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

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

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

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

    The necessary travel and health documents for your Klagenfurt 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 Klagenfurt?

Book flights to Klagenfurt if you plan to visit one of these locations
Bad Kleinkirchheim

Why use momondo?

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

It is quick and easy to find Boston to Klagenfurt flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Klagenfurt that suits you.

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

Yes. momondo allows you to filter the results for Boston to Klagenfurt flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Boston and Klagenfurt 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 Klagenfurt right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Boston to Klagenfurt flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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