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$711+ Cheap flights from Klagenfurt (KLU) to Boston (BOS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
KLU — BOS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Klagenfurt to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Klagenfurt (KLU) 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 September 11, 2025.

Round-trip from

$711
(Austrian Airlines)
From Klagenfurt to Boston Logan Intl
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Cheapest flights from Klagenfurt to Boston
Explore the most affordable flight options available from Klagenfurt to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Austrian Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 11/62:50 pmKLU - BOS
1 stop29h 15mAustrian Airlines
Sun 11/96:25 pmBOS - KLU
1 stop13h 30mAustrian Airlines
Deal found 9/10$711

Cheapflights Fare Finder

 
Customize your flight search to find flights from Klagenfurt 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 September 11, 2025.
Use the filters below to find and compare flights from Klagenfurt to Boston that are best for you.

Fly from

Klagenfurt

Fly to

Boston

Route

Depart

Return

Price

KlagenfurtBoston

KLU - BOS

KLUBOS

Klagenfurt

Thu 11/6

2:50 pm-2:05 pm

1 stop29h 15m

Boston Logan Intl

Sun 11/9

6:25 pm-1:55 pm

1 stop13h 30m

$711

KlagenfurtBoston

KLU - BOS

KLUBOS

Klagenfurt

Thu 11/6

5:45 am-9:27 pm

2 stops21h 42m

Boston Logan Intl

Sun 11/9

6:40 pm-1:55 pm

2 stops37h 15m

$711

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Klagenfurt to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Klagenfurt 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.

Related info for your journey

Find useful and relevant information for your journey from Klagenfurt 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 Klagenfurt to Boston?

    Departing from Klagenfurt to Boston will take you 21h 42m. There are 3998 mi between Klagenfurt and Boston. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Klagenfurt 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.

  • What is the cheapest month to book a flight from Klagenfurt to Boston?

    Currently, January is the cheapest month in which you can book a flight from Klagenfurt to Boston (average of $218). Flying from Klagenfurt to Boston in July is currently the most expensive (average of $311). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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