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Klagenfurt

$1,056+ Cheap flights from Boston (BOS) to Klagenfurt (KLU)

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — KLU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Find flight deals from Boston to Klagenfurt

Cheapest flights from Boston to Klagenfurt
Explore the most affordable flight options available from Boston to Klagenfurt. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This FlightHub deal was found by Cheapflights users on 9/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:00 amBOS - KLU
2 stops26h 00mMultiple Airlines
Tue 10/213:00 pmKLU - BOS
1 stop28h 50mMultiple Airlines
Deal found 9/9$1,056
This Gurufare deal was found by Cheapflights users on 9/9. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/155:10 pmBOS - KLU
1 stop14h 50mAustrian Airlines
Tue 10/213:00 pmKLU - BOS
1 stop28h 50mAustrian Airlines
Deal found 9/9$1,095

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Boston to Klagenfurt that are best for you.

Fly from

Boston

Fly to

Klagenfurt

Route

Depart

Return

Price

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 10/15

6:00 am-2:00 pm

2 stops26h 00m

Klagenfurt

Tue 10/21

3:00 pm-1:50 pm

1 stop28h 50m

$1,056

BostonKlagenfurt

BOS - KLU

BOSKLU

Boston Logan Intl

Wed 10/15

5:10 pm-2:00 pm

1 stop14h 50m

Klagenfurt

Tue 10/21

3:00 pm-1:50 pm

1 stop28h 50m

$1,095

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Best time to book a flight from Boston to Klagenfurt

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

    Airlines like Austrian Airlines fly from Boston to Klagenfurt in about 14h 50m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 3998 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to Klagenfurt by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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