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Cheap flights from Boston to Klagenfurt from $691

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 Klagenfurt departing on 11/18. 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 Klagenfurt

Cheap round-trip flights

Logo
6:25 pm - 11:25 pmBOS-KLU
23h 00m1 stop
Logo
2:50 pm - 6:02 pmKLU-BOS
33h 12m2 stops
$691
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Tue, Nov 18 - Mon, Nov 24
Logo
1:30 pm - 11:25 pmBOS-KLU
27h 55m2 stops
Logo
2:50 pm - 12:12 pmKLU-BOS
51h 22m2 stops
$692
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Tue, Nov 18 - Mon, Nov 24
Logo
6:40 pm - 1:55 pmBOS-KLU
37h 15m3 stops
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5:45 am - 2:52 pmKLU-BOS
39h 07m2 stops
$822
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Tue, Nov 18 - Mon, Nov 24
Logo
7:50 pm - 11:25 pmBOS-KLU
21h 35m3 stops
Logo
5:45 am - 5:50 pmKLU-BOS
42h 05m3 stops
$920
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Tue, Nov 18 - Mon, Nov 24
Logo
10:40 am - 2:00 pmBOS-KLU
21h 20m3 stops
Logo
5:45 am - 7:55 pmKLU-BOS
20h 10m3 stops
$1,039
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Tue, Sep 30 - Tue, Oct 7
Logo
6:00 am - 11:25 pmBOS-KLU
35h 25m3 stops
Logo
3:00 pm - 3:25 pmKLU-BOS
30h 25m3 stops
$1,321
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Thu, Sep 25 - Thu, Oct 2
Logo
8:50 pm - 2:00 pmBOS-KLU
35h 10m3 stops
Logo
8:45 am - 2:20 pmKLU-BOS
35h 35m2 stops
$1,350
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Tue, Sep 30 - Tue, Oct 7
Logo
6:00 am - 11:25 pmBOS-KLU
35h 25m2 stops
Logo
5:45 am - 9:26 pmKLU-BOS
21h 41m2 stops
$1,370
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Tue, Sep 30 - Tue, Oct 7
Logo
8:05 pm - 10:10 pmBOS-KLU
20h 05m2 stops
Logo
5:45 am - 7:50 pmKLU-BOS
20h 05m3 stops
$1,398
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Thu, Sep 25 - Thu, Oct 2
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6:30 pm - 2:00 pmBOS-KLU
37h 30m2 stops
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3:00 pm - 1:50 pmKLU-BOS
28h 50m1 stop
$1,446
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Tue, Sep 30 - Tue, Oct 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 September 15, 2025.
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

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 11/18

6:25 pm-11:25 pm

1 stop23h 00m

Klagenfurt

Mon 11/24

2:50 pm-6:02 pm

2 stops33h 12m

$691

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 11/18

1:30 pm-11:25 pm

2 stops27h 55m

Klagenfurt

Mon 11/24

2:50 pm-12:12 pm

2 stops51h 22m

$692

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 11/18

6:40 pm-1:55 pm

3 stops37h 15m

Klagenfurt

Mon 11/24

5:45 am-2:52 pm

2 stops39h 07m

$822

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 11/18

7:50 pm-11:25 pm

3 stops21h 35m

Klagenfurt

Mon 11/24

5:45 am-5:50 pm

3 stops42h 05m

$920

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 9/30

10:40 am-2:00 pm

3 stops21h 20m

Klagenfurt

Tue 10/7

5:45 am-7:55 pm

3 stops20h 10m

$1,039

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Thu 9/25

6:00 am-11:25 pm

3 stops35h 25m

Klagenfurt

Thu 10/2

3:00 pm-3:25 pm

3 stops30h 25m

$1,321

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 9/30

8:50 pm-2:00 pm

3 stops35h 10m

Klagenfurt

Tue 10/7

8:45 am-2:20 pm

2 stops35h 35m

$1,350

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 9/30

6:00 am-11:25 pm

2 stops35h 25m

Klagenfurt

Tue 10/7

5:45 am-9:26 pm

2 stops21h 41m

$1,370

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Thu 9/25

8:05 pm-10:10 pm

2 stops20h 05m

Klagenfurt

Thu 10/2

5:45 am-7:50 pm

3 stops20h 05m

$1,398

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Tue 9/30

6:30 pm-2:00 pm

2 stops37h 30m

Klagenfurt

Tue 10/7

3:00 pm-1:50 pm

1 stop28h 50m

$1,446

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Direct flights

None
There are no direct flights from Boston to Klagenfurt. There are no popular flight routes from Boston to Klagenfurt.
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  • 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 05m 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.

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

    Price Alerts will notify you by email when the price for flights to Klagenfurt 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 Klagenfurt 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?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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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