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Cheap flights from the United States to Klagenfurt from $651

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Klagenfurt departing on 5/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from the United States to Klagenfurt

Recent round-trip flight deals from the United States to Klagenfurt

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 am - 11:20 pm
SFO
-
KLU
29h 50m
2 stops
Multiple Airlines Logo
3:00 pm - 8:51 pm
KLU
-
SFO
38h 51m
2 stops
$1,165Multiple Airlines
Tue, Jun 23 - Tue, Jun 30
Multiple Airlines Logo
9:45 am - 2:00 pm
IAD
-
KLU
22h 15m
2 stops
Multiple Airlines Logo
2:50 pm - 3:10 pm
KLU
-
IAD
29h 20m
1 stop
$1,322Multiple Airlines
Wed, Oct 21 - Wed, Oct 28
Austrian Airlines Logo
1:25 pm - 2:00 pm
SFO
-
KLU
39h 35m
2 stops
Austrian Airlines Logo
3:00 pm - 12:40 pm
KLU
-
SFO
30h 40m
2 stops
$1,353Austrian Airlines
Sun, Jun 21 - Sun, Jun 28
Multiple Airlines Logo
12:58 pm - 2:00 pm
IAD
-
KLU
19h 02m
2 stops
Multiple Airlines Logo
3:00 pm - 3:00 pm
KLU
-
IAD
54h 00m
2 stops
$1,354Multiple Airlines
Wed, Sep 16 - Sun, Oct 18
Multiple Airlines Logo
9:45 am - 2:00 pm
IAD
-
KLU
22h 15m
2 stops
Multiple Airlines Logo
3:00 pm - 2:00 pm
KLU
-
IAD
29h 00m
1 stop
$1,375Multiple Airlines
Wed, Sep 16 - Sun, Oct 18
Austrian Airlines Logo
5:45 pm - 2:00 pm
IAD
-
KLU
14h 15m
1 stop
Austrian Airlines Logo
2:50 pm - 3:10 pm
KLU
-
IAD
29h 20m
1 stop
$1,384Austrian Airlines
Wed, Oct 21 - Wed, Oct 28
Multiple Airlines Logo
8:20 pm - 2:00 pm
IAD
-
KLU
35h 40m
3 stops
Multiple Airlines Logo
4:15 pm - 8:35 pm
KLU
-
IAD
34h 20m
3 stops
$1,394Multiple Airlines
Wed, Sep 16 - Sun, Oct 18
Austrian Airlines Logo
5:45 pm - 11:20 pm
IAD
-
KLU
23h 35m
1 stop
Austrian Airlines Logo
3:00 pm - 2:00 pm
KLU
-
IAD
29h 00m
1 stop
$1,433Austrian Airlines
Wed, Sep 16 - Sun, Oct 18
Austrian Airlines Logo
8:30 am - 1:25 pm
SFO
-
KLU
19h 55m
2 stops
Austrian Airlines Logo
3:00 pm - 12:40 pm
KLU
-
SFO
30h 40m
2 stops
$1,479Austrian Airlines
Thu, Jul 9 - Mon, Jul 20
Lufthansa Logo
5:30 pm - 1:25 pm
LAX
-
KLU
34h 55m
2 stops
Lufthansa Logo
3:00 pm - 3:15 pm
KLU
-
LAX
33h 15m
2 stops
$1,564Lufthansa
Fri, Jul 10 - Mon, Jul 20

Austrian Airlines flights from United States to Klagenfurt

Our best Austrian Airlines deals on United States to Klagenfurt flight tickets
Austrian Airlines
Jun 21
SFO1:25 pmSan Francisco
39h 35m
2 stops
KLU2:00 pmKlagenfurt
Jun 28
KLU3:00 pmKlagenfurt
30h 40m
2 stops
SFO12:40 pmSan Francisco
$1,353
Austrian Airlines
Oct 21
IAD5:45 pmWashington, D.C. Dulles Intl
14h 15m
1 stop
KLU2:00 pmKlagenfurt
Oct 28
KLU2:50 pmKlagenfurt
29h 20m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
$1,384
Austrian Airlines
Sep 16
IAD5:45 pmWashington, D.C. Dulles Intl
23h 35m
1 stop
KLU11:20 pmKlagenfurt
Oct 18
KLU3:00 pmKlagenfurt
29h 00m
1 stop
IAD2:00 pmWashington, D.C. Dulles Intl
$1,433

Lufthansa flights from United States to Klagenfurt

Our best Lufthansa deals on United States to Klagenfurt flight tickets
Lufthansa
Jul 10
LAX5:30 pmLos Angeles
34h 55m
2 stops
KLU1:25 pmKlagenfurt
Jul 20
KLU3:00 pmKlagenfurt
33h 15m
2 stops
LAX3:15 pmLos Angeles
$1,564
Lufthansa
Jul 12
IAD5:55 pmWashington, D.C. Dulles Intl
14h 05m
2 stops
KLU2:00 pmKlagenfurt
Jul 17
KLU2:05 pmKlagenfurt
29h 30m
2 stops
IAD1:35 pmWashington, D.C. Dulles Intl
$2,521

momondo Fare Finder

 
Customize your flight search to find flights from United States 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, momondo users made 832,500 searches. Data last updated May 11, 2026.
Use the filters below to find and compare flights from the United States to Klagenfurt that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoKlagenfurt

SFO - KLU

SFOKLU

San Francisco

Tue 6/23

8:30 am-11:20 pm

2 stops29h 50m

Klagenfurt

Tue 6/30

3:00 pm-8:51 pm

2 stops38h 51m

$1,165

Washington, D.C.Klagenfurt

IAD - KLU

IADKLU

Washington, D.C. Dulles Intl

Wed 10/21

9:45 am-2:00 pm

2 stops22h 15m

Klagenfurt

Wed 10/28

2:50 pm-3:10 pm

1 stop29h 20m

$1,322

San FranciscoKlagenfurt

SFO - KLU

SFOKLU

San Francisco

Sun 6/21

1:25 pm-2:00 pm

2 stops39h 35m

Klagenfurt

Sun 6/28

3:00 pm-12:40 pm

2 stops30h 40m

$1,353

Washington, D.C.Klagenfurt

IAD - KLU

IADKLU

Washington, D.C. Dulles Intl

Wed 9/16

12:58 pm-2:00 pm

2 stops19h 02m

Klagenfurt

Sun 10/18

3:00 pm-3:00 pm

2 stops54h 00m

$1,354

Washington, D.C.Klagenfurt

IAD - KLU

IADKLU

Washington, D.C. Dulles Intl

Wed 9/16

9:45 am-2:00 pm

2 stops22h 15m

Klagenfurt

Sun 10/18

3:00 pm-2:00 pm

1 stop29h 00m

$1,375
Quickest round-trip

Washington, D.C.Klagenfurt

IAD - KLU

IADKLU

Washington, D.C. Dulles Intl

Wed 10/21

5:45 pm-2:00 pm

1 stop14h 15m

Klagenfurt

Wed 10/28

2:50 pm-3:10 pm

1 stop29h 20m

$1,384

Washington, D.C.Klagenfurt

IAD - KLU

IADKLU

Washington, D.C. Dulles Intl

Wed 9/16

8:20 pm-2:00 pm

3 stops35h 40m

Klagenfurt

Sun 10/18

4:15 pm-8:35 pm

3 stops34h 20m

$1,394

Washington, D.C.Klagenfurt

IAD - KLU

IADKLU

Washington, D.C. Dulles Intl

Wed 9/16

5:45 pm-11:20 pm

1 stop23h 35m

Klagenfurt

Sun 10/18

3:00 pm-2:00 pm

1 stop29h 00m

$1,433

San FranciscoKlagenfurt

SFO - KLU

SFOKLU

San Francisco

Thu 7/9

8:30 am-1:25 pm

2 stops19h 55m

Klagenfurt

Mon 7/20

3:00 pm-12:40 pm

2 stops30h 40m

$1,479

Los AngelesKlagenfurt

LAX - KLU

LAXKLU

Los Angeles

Fri 7/10

5:30 pm-1:25 pm

2 stops34h 55m

Klagenfurt

Mon 7/20

3:00 pm-3:15 pm

2 stops33h 15m

$1,564

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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How to get the cheapest flight ticket from United States to Klagenfurt

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on United States to Klagenfurt flights?

You could potentially save up to 42% on your flight if you consider stops on a United States to Klagenfurt flight.

Cheap United States to Klagenfurt flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Klagenfurt

Fastest flight time

13h 55m

Direct flights

None
The fastest flight from United States to Klagenfurt takes 13h 55m
There are no direct flights from United States to Klagenfurt. There are no popular flight routes from United States to Klagenfurt.
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Frequently asked questions about flying from the United States to Klagenfurt

  • When did momondo last update prices for flights from United States to Klagenfurt Airport?

    Prices for flights from United States to Klagenfurt Airport are refreshed on a daily basis.

  • How old do you have to be to fly from United States to Klagenfurt Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to Klagenfurt Airport.

  • What documentation or ID do you need to fly to Klagenfurt Airport?

    The necessary travel and health documents for your Klagenfurt Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Klagenfurt?

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

Why use momondo?

Why should I use momondo to find a flight deal from United States to Klagenfurt?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from United States to Klagenfurt. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from United States to Klagenfurt with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Klagenfurt from United States with this policy.

How can momondo help me find flights from United States to Klagenfurt?

Once all potential United States to Klagenfurt flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from United States to Klagenfurt right now. Can momondo alert me if prices change?

Yes. momondo can track prices for United States to Klagenfurt flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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