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$761+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
KLU — BOS
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$761
(Austrian Airlines)
From Klagenfurt to Boston Logan Intl
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Find flight deals from Klagenfurt to Boston

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 July 31, 2025.

This Austrian Airlines deal was found by Cheapflights users on 7/29. 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.
Fri 11/75:45 amKLU - BOS
1 stop14h 20mAustrian Airlines
Sun 11/96:25 pmBOS - KLU
1 stop13h 30mAustrian Airlines
Deal found 7/29$761
This Lufthansa deal was found by Cheapflights users on 7/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:50 pmKLU - BOS
2 stops28h 35mLufthansa
Sun 11/98:40 pmBOS - KLU
2 stops44h 45mLufthansa
Deal found 7/29$764

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 July 31, 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

Fri 11/7

5:45 am-2:05 pm

1 stop14h 20m

Boston Logan Intl

Sun 11/9

6:25 pm-1:55 pm

1 stop13h 30m

$761

KlagenfurtBoston

KLU - BOS

KLUBOS

Klagenfurt

Fri 11/7

2:50 pm-1:25 pm

2 stops28h 35m

Boston Logan Intl

Sun 11/9

8:40 pm-11:25 pm

2 stops44h 45m

$764

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with Austrian Airlines and Lufthansa from Klagenfurt to Boston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
823 reviews

Crew

8.1

Entertainment

6.8

Overall

7.6

Comfort

7.3

Boarding

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
823 reviews
Austrian Airlines
7.6
Good
823 reviews

Crew

8.1

Entertainment

6.8

Overall

7.6

Comfort

7.3

Boarding

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Lufthansa
6.8
Okay
7,269 reviews
Austrian Airlines
7.6
Good
823 reviews

Crew

8.1

Entertainment

6.8

Overall

7.6

Comfort

7.3

Boarding

7.6

Food

6.8

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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.

  • 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

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
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Randolph
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Warwick
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Lincoln

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