KLU

$430 Find Cheap Flights to Klagenfurt - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$1,040
Typical prices: $848-$1,119
Multiple Airlines
Mon 10/1Mon 10/8
BOS - KLU • 3 stops
Cheapest one-way
$430
Typical prices: $622-$855
Multiple Airlines
Sat 9/15
BOS - KLU • 2 stops
Top airlines
Austrian Airlines
Best reviews • 7.6 score
Airline reviews
Airline reviews
When to travel
November
Cheapest • 15% price drop
March
Most popular
Good to know
+1
Good to know
+1
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Booking Insights
Flight Deals

Cheap Flights to Klagenfurt

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals to Klagenfurt

Thu, Oct 1 - Thu, Oct 8
Multiple Airlines Logo
9:15 pm - 11:20 pmBOS  Boston Logan Intl-KLU Klagenfurt
20h 05m3 stops Dublin Geneva Geneve-Cointrin Vienna Intl
Multiple Airlines Logo
5:50 am - 2:55 pmKLU  Klagenfurt-BOS Boston Logan Intl
15h 05m3 stops Vienna Intl Geneva Geneve-Cointrin Dublin
$1,040Multiple Airlines
Fri, Oct 2 - Fri, Oct 9
Air Canada Logo
7:50 am - 2:00 pmMSP  Minneapolis St Paul-KLU Klagenfurt
23h 10m2 stops Toronto Pearson Intl Vienna Intl
Air Canada Logo
5:50 am - 7:49 pmKLU  Klagenfurt-MSP Minneapolis St Paul
20h 59m2 stops Vienna Intl Toronto Pearson Intl
$1,046Air Canada
Fri, Oct 2 - Fri, Oct 9
Air Canada Logo
9:45 am - 2:00 pmMSP  Minneapolis St Paul-KLU Klagenfurt
21h 15m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vienna Intl
Air Canada Logo
5:50 am - 7:49 pmKLU  Klagenfurt-MSP Minneapolis St Paul
20h 59m2 stops Vienna Intl Toronto Pearson Intl
$1,050Air Canada
Sat, Oct 10 - Sat, Oct 17
Air Canada Logo
5:40 am - 2:00 pmSEA  Seattle/Tacoma Intl-KLU Klagenfurt
23h 20m3 stops Vancouver Intl Toronto Pearson Intl Vienna Intl
Air Canada Logo
5:50 am - 9:04 pmKLU  Klagenfurt-SEA Seattle/Tacoma Intl
24h 14m2 stops Vienna Intl Toronto Pearson Intl
$1,051Air Canada
Fri, Oct 2 - Fri, Oct 9
Air Canada Logo
8:04 am - 2:00 pmMSP  Minneapolis St Paul-KLU Klagenfurt
22h 56m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vienna Intl
Air Canada Logo
5:50 am - 8:02 pmKLU  Klagenfurt-MSP Minneapolis St Paul
21h 12m3 stops Vienna Intl Toronto Pearson Intl Chicago O'Hare Intl
$1,061Air Canada
Thu, Oct 29 - Mon, Nov 2
Multiple Airlines Logo
5:30 am - 10:30 amBOS  Boston Logan Intl-KLU Klagenfurt
24h 00m2 stops Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:40 am - 1:30 pmKLU  Klagenfurt-BOS Boston Logan Intl
31h 50m1 stop Vienna Intl
$1,083Multiple Airlines
Thu, Oct 29 - Mon, Nov 2
Multiple Airlines Logo
5:30 am - 10:30 amBOS  Boston Logan Intl-KLU Klagenfurt
24h 00m2 stops Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:40 am - 5:27 pmKLU  Klagenfurt-BOS Boston Logan Intl
35h 47m2 stops Vienna Intl Newark
$1,088Multiple Airlines
Thu, Oct 29 - Mon, Nov 2
Multiple Airlines Logo
5:30 am - 10:30 amBOS  Boston Logan Intl-KLU Klagenfurt
24h 00m2 stops Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:40 am - 1:30 pmKLU  Klagenfurt-BOS Boston Logan Intl
31h 50m1 stop Vienna Intl
$1,089Multiple Airlines
Thu, Oct 29 - Mon, Nov 2
Multiple Airlines Logo
5:30 am - 10:30 amBOS  Boston Logan Intl-KLU Klagenfurt
24h 00m2 stops Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:40 am - 5:27 pmKLU  Klagenfurt-BOS Boston Logan Intl
35h 47m2 stops Vienna Intl Newark
$1,094Multiple Airlines
Sat, Sep 19 - Fri, Oct 2
Multiple Airlines Logo
6:50 pm - 2:00 pmMSP  Minneapolis St Paul-KLU Klagenfurt
36h 10m2 stops Chicago O'Hare Intl Vienna Intl
Multiple Airlines Logo
5:50 am - 10:23 amKLU  Klagenfurt-MSP Minneapolis St Paul
35h 33m2 stops Vienna Intl Washington, D.C. Dulles Intl
$1,097Multiple Airlines
Booking Insights

KAYAK's insights & trends for flights to Klagenfurt

Get data-powered insights and trends for flights to Klagenfurt to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest day to fly to Klagenfurt?

Monday is the cheapest day to fly to Klagenfurt at $801 round-trip on average over the past 12 months on KAYAK. Thursday is the most expensive at $1,176.

What is the cheapest time of day to fly to Klagenfurt?

Morning flights to Klagenfurt are the cheapest at $910 round-trip on average. Afternoon flights are the most expensive at $1,042.

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Key details for flights to Klagenfurt

Low season

August

Cheapest flight

$430
Most popular time to fly and prices are also 3% lower on average.
Flight from Boston to Klagenfurt

When to book flights to Klagenfurt

Are your dates flexible? Find out the best times to travel to Klagenfurt based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your questions about flights to Klagenfurt, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • What is the difference between the most popular and the most frequent airline at Klagenfurt?

    Austrian Airlines operates the most flights from the United States to Klagenfurt at 0 per week, and for this route Austrian Airlines is also the airline most often selected by KAYAK users searching for flights from the United States to Klagenfurt. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveler choice.

  • How do I know if a flight to Klagenfurt is a good deal?

    A good deal on a flight to Klagenfurt is around $848 round-trip. This fare is in the lowest 25% of round-trip prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

  • Which airlines should I consider for flights to Klagenfurt?

    Austrian Airlines is the most popular airline with KAYAK users flying to Klagenfurt, and has the best on-time record at the destination's main airport.

Your guide to booking Klagenfurt flights

From booking to airport arrival, find tips to help you plan your flight with more confidence.
  • For flights to Klagenfurt, recent KAYAK data shows that stronger deals tend to land around $848 round-trip. If you see a fare below that threshold, it's a strong deal – book before the price climbs back up.
  • If you can choose when to go, time your trip to Klagenfurt around November. Round-trip fares historically average $801 that month – typically the cheapest month to travel based on the last 12 months.
  • Before you book:

    • Check the route's typical price range so you can spot a deal.
    • Confirm baggage fees and seat-selection costs on budget carriers.
    • Verify whether you need any travel documents beyond ID.
    • Pick a departure airport, since your nearest may not be the cheapest origin.
  • Shift your departure to morning to save up to $132 per round-trip. Morning flights to Klagenfurt average $910 compared to $1,042 for noon flights. See the time-of-day chart above for the full breakdown.

Reviews of the top airline flying to Klagenfurt

 
Need help choosing which airline to fly with to Klagenfurt? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
Austrian AirlinesOverall score based on 949 reviews
8.1Crew
6.8Entertainment
7.6Boarding
7.3Comfort
6.8Food
Airline reviews

I am very satisfied for choosing that Airlines! It was my first time but the everything went smoothly! Thank you!

10.0 ExcellentMaria, Jun 2026
Read more Austrian Airlines reviews

I am very satisfied for choosing that Airlines! It was my first time but the everything went smoothly! Thank you!

OK, would prefer some meat for dinner, not just pasta although was tasty. There was only one dish, no choices

It was a great experience. The aircraft is a bit dated but other than that it was great.

Booked economy. Seat felt like it was a bit more roomy than my last trans Atlantic flights. I had a nice person sitting next to me. Everything was as good as it could be considering you are 35,000 feet up in the air and in a metal container. Beers, wine, food were all readily available. Plenty of movies and shows to watch. Friendly flight staff

We were delayed three hours from Montenegro to Vienna on our outbound flight and then rebooked an extra leg on our trip to the US. Our bags, which Austrian made us check in in Montenegro even though the flight was barely half full, didn't find us for ten days. Then, when we asked for compensation for the delay we were given the runaround that the flight originated outside of the EU. Next time we fly Turkish Air.

Despite the booked seats in front of the land we were moved to the back of the plane even first like 8 lines were totally without pasangers. When I tried to sit on empty seat flight attendant asked me to go to my dedicated seat in the fully crowded back of the plane. She was not able to explain why. Food was very poor on flight LAX - VIE.

Austrian Airlines help and service was fine, but Kayak misled us into believing we had purchased a Business Class ticket. In fact, the tickets were only upgraded Coach Class tickets with luggage restrictions that belonged to the Coach Class. Very disappointed! Paid over $$$$ 9K for the two tickets. Very disappointing!

WiFi would have been nice and some more powerful usb ports, available ports could not keep my phone’s charge much less charge the phone.

Pleasant up to Vienna. Afterward (Vienna- Zagreb) was an horrific experience

Leg room and seat back not a good recline (middle seat)

Traveling to a place near Klagenfurt?

Book flights to Klagenfurt if you plan to visit one of these locations
Bad Kleinkirchheim
Tamsweg

Everything you need to know for your flight to Klagenfurt

Information on the airport you'll fly into in Klagenfurt

Klagenfurt (KLU)