KLU

$334 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
$960
Typical prices: $848-$1,119
Air Canada
Sun 10/28Thu 11/1
SFO - KLU • 2 stops
Cheapest one-way
$334
Typical prices: $622-$855
Multiple Airlines
Tue 10/2
LAX - KLU • 2 stops
Top airlines
Austrian Airlines
Best reviews • 7.6 score
Airline reviews
Airline reviews
Top routes
ATL - KLU
Cheapest • 44% average savings
WAS - KLU
Most popular
Insights
Insights
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

Wed, Oct 28 - Sun, Nov 1
Multiple Airlines Logo
8:10 am - 10:30 amSFO  San Francisco-KLU Klagenfurt
18h 20m2 stops Toronto Pearson Intl Vienna Intl
Multiple Airlines Logo
11:15 am - 9:33 pmKLU  Klagenfurt-SFO San Francisco
43h 18m2 stops Vienna Intl Montreal Pierre Elliott Trudeau Intl
$960Multiple Airlines
Thu, Oct 29 - Sun, Nov 1
Multiple Airlines Logo
8:25 am - 10:30 amSFO  San Francisco-KLU Klagenfurt
18h 05m2 stops Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:15 am - 9:33 pmKLU  Klagenfurt-SFO San Francisco
43h 18m2 stops Vienna Intl Montreal Pierre Elliott Trudeau Intl
$1,016Multiple Airlines
Wed, Oct 28 - Sun, Nov 1
Lufthansa Logo
10:40 pm - 10:30 amSFO  San Francisco-KLU Klagenfurt
27h 50m2 stops Munich Franz Josef Strauss Vienna Intl
Lufthansa Logo
11:15 am - 12:35 pmKLU  Klagenfurt-SFO San Francisco
58h 20m2 stops Vienna Intl Frankfurt am Main
$1,023Lufthansa
Thu, Oct 29 - Sun, Nov 1
Multiple Airlines Logo
6:16 am - 10:30 amSFO  San Francisco-KLU Klagenfurt
20h 14m3 stops Denver Intl Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:15 am - 7:35 pmKLU  Klagenfurt-SFO San Francisco
17h 20m2 stops Vienna Intl Munich Franz Josef Strauss
$1,081Multiple Airlines
Sun, Oct 18 - Sun, Oct 25
Multiple Airlines Logo
7:30 am - 1:55 pmLAX  Los Angeles-KLU Klagenfurt
21h 25m2 stops Toronto Pearson Intl Vienna Intl
Multiple Airlines Logo
11:15 am - 2:05 pmKLU  Klagenfurt-LAX Los Angeles
58h 50m2 stops Vienna Intl Frankfurt am Main
$1,099Multiple Airlines
Sun, Oct 18 - Sun, Oct 25
Lufthansa Logo
4:00 pm - 1:55 pmDTW  Detroit Metropolitan Wayne County-KLU Klagenfurt
15h 55m2 stops Frankfurt am Main Vienna Intl
Lufthansa Logo
11:15 am - 3:15 pmKLU  Klagenfurt-DTW Detroit Metropolitan Wayne County
57h 00m2 stops Vienna Intl Frankfurt am Main
$1,123Lufthansa
Wed, Oct 28 - Sun, Nov 1
Multiple Airlines Logo
11:29 pm - 10:30 amSFO  San Francisco-KLU Klagenfurt
27h 01m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:15 am - 7:35 pmKLU  Klagenfurt-SFO San Francisco
17h 20m2 stops Vienna Intl Munich Franz Josef Strauss
$1,133Multiple Airlines
Sun, Oct 18 - Sun, Oct 25
Multiple Airlines Logo
8:15 am - 1:55 pmLAX  Los Angeles-KLU Klagenfurt
20h 40m2 stops Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:15 am - 12:21 amKLU  Klagenfurt-LAX Los Angeles
21h 06m3 stops Vienna Intl Munich Franz Josef Strauss San Francisco
$1,243Multiple Airlines
Thu, Oct 29 - Sun, Nov 1
Multiple Airlines Logo
6:16 am - 10:30 amSFO  San Francisco-KLU Klagenfurt
20h 14m3 stops Denver Intl Montreal Pierre Elliott Trudeau Intl Vienna Intl
Multiple Airlines Logo
11:15 am - 11:28 pmKLU  Klagenfurt-SFO San Francisco
21h 13m3 stops Vienna Intl Munich Franz Josef Strauss Chicago O'Hare Intl
$1,276Multiple Airlines
Mon, Nov 23 - Sun, Nov 29
Multiple Airlines Logo
9:20 pm - 10:55 amBOS  Boston Logan Intl-KLU Klagenfurt
31h 35m3 stops Dublin Amsterdam Schiphol Vienna Intl
Multiple Airlines Logo
11:15 am - 2:40 pmKLU  Klagenfurt-BOS Boston Logan Intl
33h 25m3 stops Vienna Intl Barcelona-El Prat Lisbon Humberto Delgado
$1,321Multiple Airlines
Booking Insights

Price, demand and travel trends for United States to Klagenfurt flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from the United States to Klagenfurt with more confidence.

What is the cheapest flight to Klagenfurt?

San Francisco to Klagenfurt is the cheapest route at $960 round-trip, found in the past 5 days on KAYAK. Boston to Klagenfurt is the most popular connection with round-trip deals from $1,321.

How much is a flight to Klagenfurt?

A round-trip flight to Klagenfurt costs $945 on average, based on data over the past 12 months on KAYAK. Round-trip fares from Atlanta average $735, while Boston runs a bit higher at $1,521.

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.

What is a good deal for flights to Klagenfurt?

Flights under $848 are considered a good deal. 25% of KAYAK users found round-trip flights to Klagenfurt at or below these prices, with the lowest fares from:

  • Atlanta $735
.

Find deals

Key details for flights to Klagenfurt

Low season

August

Cheapest flight

$334
Most popular time to fly and prices are also 3% lower on average.
Flight from Los Angeles 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.

  • Where can I fly from to get the cheapest fares to Klagenfurt?

    Based on fares booked in the past 5 days, the cheapest flights to Klagenfurt are from:
    • Detroit, from $1,123 round-trip

  • 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.

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 951 reviews
7.6Boarding
8.1Crew
6.8Food
7.3Comfort
6.8Entertainment
Airline reviews

The good: we liked fast boarding, the departure and arrival on-time. The not-so-good: The crew should learn from their sister-company Swiss with whom we took the flight to the US. Austrian onboard personnel need to smile more and provide a better service. Food was okay, there was the usual issue with “no more chicken” by the time they reach row X 😕. We did not understand why the crew collected trash so randomly and inadequately. We missed the free internet for messaging which was privided by Swiss as well. Hope this feedback helps.

8.0 ExcellentBen, Sep 2026
Read more Austrian Airlines reviews

The good: we liked fast boarding, the departure and arrival on-time. The not-so-good: The crew should learn from their sister-company Swiss with whom we took the flight to the US. Austrian onboard personnel need to smile more and provide a better service. Food was okay, there was the usual issue with “no more chicken” by the time they reach row X 😕. We did not understand why the crew collected trash so randomly and inadequately. We missed the free internet for messaging which was privided by Swiss as well. Hope this feedback helps.

They should be kind to the people Food is always plain pasta bread is from the fridge they don't even warm up Seat is so uncomfortable body hurts

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.

Traveling to a place near Klagenfurt?

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

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