$780 Find Cheap Flights from Southeast Europe to St. Louis

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Cheap Flights from Southeast Europe to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Southeast Europe to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Southeast Europe to St. Louis

Fri, Oct 10 - Fri, Oct 17
American Airlines Logo
1:40 pm - 8:53 amZAG-STL
26h 13m2 stops
American Airlines Logo
6:05 pm - 7:55 pmSTL-ZAG
18h 50m2 stops
$780American Airlines
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Wed, Oct 29 - Wed, Nov 5
United Airlines Logo
6:15 am - 2:55 pmZAG-STL
14h 40m1 stop
United Airlines Logo
3:50 pm - 1:50 pmSTL-ZAG
15h 00m1 stop
$850United Airlines
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Wed, Oct 29 - Wed, Nov 5
Lufthansa Logo
6:55 am - 5:39 pmZAG-STL
16h 44m2 stops
Lufthansa Logo
11:49 am - 9:10 amSTL-ZAG
14h 21m2 stops
$853Lufthansa
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Tue, Oct 14 - Tue, Oct 21
Lufthansa Logo
6:05 am - 3:44 pmZAG-STL
16h 39m2 stops
Lufthansa Logo
12:25 pm - 11:25 amSTL-ZAG
16h 00m2 stops
$855Lufthansa
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Mon, Oct 20 - Wed, Dec 10
United Airlines Logo
6:05 am - 10:49 amZAG-STL
35h 44m2 stops
United Airlines Logo
9:00 am - 10:25 pmSTL-ZAG
30h 25m2 stops
$867United Airlines
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Thu, Oct 30 - Thu, Nov 6
United Airlines Logo
6:15 am - 9:54 pmZAG-STL
21h 39m2 stops
United Airlines Logo
4:43 pm - 10:15 pmSTL-ZAG
46h 32m2 stops
$876United Airlines
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Sat, Oct 18 - Sun, Nov 9
Lufthansa Logo
6:00 am - 3:44 pmZAG-STL
16h 44m2 stops
Lufthansa Logo
3:50 pm - 2:00 pmSTL-ZAG
15h 10m1 stop
$880Lufthansa
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Mon, Oct 13 - Mon, Oct 20
Lufthansa Logo
6:15 am - 3:44 pmSKP-STL
40h 29m2 stops
Lufthansa Logo
12:25 pm - 2:15 pmSTL-SKP
18h 50m2 stops
$891Lufthansa
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Thu, Nov 27 - Mon, Dec 1
Delta Logo
6:30 am - 6:35 pmZAG-STL
19h 05m2 stops
Delta Logo
11:44 am - 2:35 pmSTL-ZAG
19h 51m2 stops
$924Delta
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Thu, Nov 27 - Mon, Dec 1
Delta Logo
6:30 am - 6:35 pmZAG-STL
19h 05m2 stops
Delta Logo
1:55 pm - 2:35 pmSTL-ZAG
17h 40m2 stops
$931Delta
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Everything you should know

Cheapest round-trip
$780
American Airlines
Fri 10/10Fri 10/17
ZAG - STL • 2 stops
Cheapest one-way
$788
Lufthansa
Sun 10/5
OTP - STL • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Useful Info

Good to know

Low seasonDecember
Cheapest flight$780
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Zagreb to St. Louis

FAQs for booking flights from Southeast Europe to St. Louis

  • How does KAYAK find such low prices on flights from Southeast Europe to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Southeast Europe to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Southeast Europe to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Southeast Europe is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Southeast Europe to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Southeast Europe with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Southeast Europe to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Southeast Europe up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Southeast Europe to St. Louis

 
Need help choosing which airline to fly with from Southeast Europe to St. Louis? 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.
7.8
KLMOverall score based on 1385 reviews
7.8Boarding
7.7Comfort
8.4Crew
7.3Food
7.2Entertainment
Airline reviews

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

10.0 ExcellentCameron, Sep 2025YYJ - YYC
Read more KLM reviews

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

My flight was delayed about 1 1/2 hours in Chicago, but other then that it was a good flight.

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

Food could have something without dairy, I couldn't eat anything. Tv for both seats was malfunctioning. They have one bottle of ginger ale for entire plane.... and I paid extra for these seats...very disappointed

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

We took two long flights with Lufthansa, both were delayed making us miss our connecting flights. Lufthansa took care of the first one. The second was a switch to United and figuring out how to rebook was not a pleasant experience.

It was chaotic. It was overbooked so we didn't have seats until the end but they turned out to be good seats. The gate was at the end of the airport. We had to get busses to the tarmac and board. It just seemed chaotic. Flight was OK. Food was not so good. Lufthansa used to be such a great airline and now as it's with everything else: If you have money you get comforts but if you don't then you end up below deck with the rest of the cattle.

Welp - they boarded us appropriately...then had us sit on the plane for over two hours before cancelling the flight...which meant another night in Munich. I probably had it a little better than most as over 500 people had to be accommodated/re-booked etc. The next day I boarded the same flight (for which I had now been ticketed 3 straight days) and - with "only" an hour delay, managed to finally get home over 2 days later than scheduled. I haven't flown Lufthansa to Europe in years...and I won't be looking to do so again in the future. To be clear, though, the people I interacted with - flight crew, Service Center, check-in were all professional and courteous - management is clearly to blame for their lack of communication and unpreparedness for when things go wrong.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Both flights were delayed over 1 hour. And I had to pay for seats, even though my reservation supposedly included free seat selection.

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Seat very cramped, could not recline. No cheese with meal. Staff very helpful.

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