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Cheap flights from Boston to Klagenfurt from $875

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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Cheap round-trip flights

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Multiple Airlines Logo
BOS
-
KLU
3998 mimulti-stop
Multiple Airlines Logo
KLU
-
BOS
3998 mimulti-stop
Multiple Airlines

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 March 14, 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 one-way

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 9/9

10:40 am-2:00 pm

2 stops21h 20m

$875
Quickest one-way

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 9/9

5:10 pm-2:00 pm

1 stop14h 50m

$911

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 9/9

3:35 pm-2:00 pm

3 stops16h 25m

$920

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 9/9

5:10 pm-2:00 pm

1 stop14h 50m

$934

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 9/9

3:35 pm-2:00 pm

3 stops16h 25m

$3,974

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 9/9

3:35 pm-2:00 pm

3 stops16h 25m

$4,024

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

21h 20m

Direct flights

None
The fastest flight from Boston to Klagenfurt takes 21h 20m
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. 21h 20m 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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