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$789+ 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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.
KLU — BOS
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
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 October 29, 2025.

Round-trip from

$789
(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 October 29, 2025.

This Austrian Airlines deal was found by Cheapflights users on 10/28. 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 11/202:50 pmKLU - BOS
1 stop29h 15mAustrian Airlines
Sun 11/236:25 pmBOS - KLU
1 stop13h 30mAustrian Airlines
Deal found 10/28$789
This Air Canada deal was found by Cheapflights users on 10/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/205:45 amKLU - BOS
2 stops33h 47mAir Canada
Sun 11/236:40 pmBOS - KLU
2 stops37h 15mAir Canada
Deal found 10/26$818
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/115:45 amKLU - BOS
2 stops34h 12mMultiple Airlines
Tue 11/186:40 pmBOS - KLU
3 stops37h 15mMultiple Airlines
Deal found 10/28$860

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 October 29, 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 11/20

2:50 pm-2:05 pm

1 stop29h 15m

Boston Logan Intl

Sun 11/23

6:25 pm-1:55 pm

1 stop13h 30m

$789

KlagenfurtBoston

KLU - BOS

KLUBOS

Klagenfurt

Thu 11/20

5:45 am-9:32 am

2 stops33h 47m

Boston Logan Intl

Sun 11/23

6:40 pm-1:55 pm

2 stops37h 15m

$818

KlagenfurtBoston

KLU - BOS

KLUBOS

Klagenfurt

Tue 11/11

5:45 am-9:57 am

2 stops34h 12m

Boston Logan Intl

Tue 11/18

7:55 pm-1:55 pm

2 stops36h 00m

$860

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

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 29h 15m. There are 3998 mi between Klagenfurt and Boston.

  • 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.

See more FAQs

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