$1,010+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — KLU
Feb 26 — Mar 51
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boston to Klagenfurt
Cheapest flights from Boston to KlagenfurtExplore 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 January 27, 2026.
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 January 27, 2026.
This FlightHub deal was found by Cheapflights users on 1/25. 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 9/910:35 am
BOS
- KLU
2 stops21h 25m
Multiple Airlines
Sun 9/203:00 pm
KLU
- BOS
1 stop28h 50m
Multiple Airlines
Deal found 1/25![Multiple Airlines logo]()
$1,010
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:10 pm
BOS
- KLU
1 stop24h 10m
Austrian Airlines
Sun 9/203:00 pm
KLU
- BOS
1 stop28h 50m
Austrian Airlines
Deal found 1/25![Austrian Airlines logo]()
$1,045
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:05 pm
BOS
- KLU
2 stops35h 55m
Lufthansa
Sun 9/203:00 pm
KLU
- BOS
2 stops54h 40m
Lufthansa
Deal found 1/26![Lufthansa logo]()
$1,085
This Air Canada deal was found by Cheapflights users on 1/26. 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.
Fri 4/36:15 am
BOS
- KLU
2 stops25h 45m
Air Canada
Tue 4/75:45 am
KLU
- BOS
2 stops18h 12m
Air Canada
Deal found 1/26![Air Canada logo]()
$1,119
Find flight deals from Boston to Klagenfurt
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Klagenfurt (KLU). 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 January 27, 2026.
Most accurate provider | Expedia 1 star |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $1,119 (Air Canada) |
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 January 27, 2026.
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
Fri 4/3
10:45 am-2:00 pm
2 stops21h 15m
Klagenfurt
Tue 4/7
5:45 am-9:27 pm
2 stops21h 42m
$1,119
- Most accurate provider: When it comes to deals on Boston-Klagenfurt flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Boston-Klagenfurt flight deals on Cheapflights vs. Expedia <90% of the time. Price accuracy is based on data collected from Boston-Klagenfurt flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boston-Klagenfurt flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Klagenfurt flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.