STL - OTP

$349 Find Cheap Flights from St. Louis to Bucharest

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Bucharest departing on 8/3. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Bucharest Otopeni Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Bucharest, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Bucharest, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$844
Lufthansa
Sun 4/26Sun 5/3
STL - OTP • 2 stops
Cheapest one-way
$349
British Airways
Mon 8/3
STL - OTP • 2 stops
Top airlines
Cheapest • from $844 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Bucharest. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $693 (round-trip)
Shortest trip • 14h 03m (one-way)
Insights
Insights
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Bucharest!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Bucharest (STL-OTP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Bucharest 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 St. Louis to Bucharest

Sun, Apr 26 - Sun, May 3
Lufthansa Logo
6:55 pm - 6:35 pm
STL
-
OTP
15h 40m
2 stops
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$844Lufthansa
Sun, Apr 26 - Sun, May 3
Multiple Airlines Logo
6:55 pm - 6:35 pm
STL
-
OTP
15h 40m
2 stops
Multiple Airlines Logo
6:20 am - 8:25 pm
OTP
-
STL
22h 05m
2 stops
$857Multiple Airlines
Sun, Apr 26 - Sun, May 3
Turkish Airlines Logo
7:45 am - 8:15 pm
STL
-
OTP
28h 30m
2 stops
Turkish Airlines Logo
9:35 pm - 9:13 pm
OTP
-
STL
31h 38m
2 stops
$870Turkish Airlines
Mon, Jul 27 - Mon, Aug 3
Multiple Airlines Logo
3:30 pm - 1:05 pm
STL
-
OTP
13h 35m
1 stop
Multiple Airlines Logo
9:30 am - 5:30 pm
OTP
-
STL
40h 00m
2 stops
$890Multiple Airlines
Mon, Jul 27 - Mon, Aug 3
Turkish Airlines Logo
5:33 pm - 8:15 pm
STL
-
OTP
42h 42m
2 stops
Turkish Airlines Logo
9:35 pm - 9:16 pm
OTP
-
STL
31h 41m
2 stops
$936Turkish Airlines
Mon, Jul 27 - Mon, Aug 3
Turkish Airlines Logo
5:33 pm - 8:10 am
STL
-
OTP
30h 37m
2 stops
Turkish Airlines Logo
3:55 pm - 9:16 pm
OTP
-
STL
37h 21m
2 stops
$945Turkish Airlines
Sun, Apr 26 - Sun, May 3
Lufthansa Logo
6:55 pm - 6:35 pm
STL
-
OTP
15h 40m
2 stops
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$991Lufthansa
Mon, Jul 27 - Sat, Aug 1
Multiple Airlines Logo
3:30 pm - 1:05 pm
STL
-
OTP
13h 35m
1 stop
Multiple Airlines Logo
9:30 am - 5:30 pm
OTP
-
STL
40h 00m
2 stops
$994Multiple Airlines
Sun, Apr 26 - Sun, May 3
British Airways Logo
9:40 pm - 12:50 am
STL
-
OTP
19h 10m
1 stop
British Airways Logo
8:10 am - 7:30 pm
OTP
-
STL
19h 20m
1 stop
$1,015British Airways
Mon, Jul 27 - Mon, Aug 3
Lufthansa Logo
1:13 pm - 1:10 am
STL
-
OTP
27h 57m
2 stops
Lufthansa Logo
5:15 pm - 1:25 pm
OTP
-
STL
28h 10m
1 stop
$1,027Lufthansa
Booking Insights

KAYAK's insights & trends for St. Louis to Bucharest flights

Get data-powered insights and trends into flights from St. Louis to Bucharest to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Bucharest?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Bucharest were found on Lufthansa ($844) and Turkish Airlines ($870).

Good to know

Cheapest flight$349
Flight from St. Louis to Bucharest

When to book flights from St. Louis to Bucharest

Are your dates flexible? Find out the best times to travel from St. Louis to Bucharest based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Bucharest flights

  • What is the cheapest flight from St. Louis to Bucharest Otopeni Intl Airport?

    In the last 3 days, the lowest price for a flight from St. Louis to Bucharest Otopeni Intl Airport was $349 for a one-way ticket and $844 for a round-trip.

  • Do I need a passport to fly between St. Louis and Bucharest?

    Yes, you’ll need a passport to travel to Bucharest from St. Louis.

  • Which airports will I be using when flying from St. Louis to Bucharest?

    St. Louis and Bucharest are both served by 1 main airport. You will leave St. Louis from Lambert-St Louis and will be arriving at Bucharest Otopeni Intl.

  • Which aircraft models fly most regularly from St. Louis to Bucharest?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Bucharest?

    Star Alliance is the only airline alliance operating flights between St. Louis and Bucharest.

  • Which is the best airline for flights from St. Louis to Bucharest, United Airlines or Lufthansa?

    The two airlines most popular with KAYAK users for flights from St. Louis to Bucharest are United Airlines and Lufthansa. With an average price for the route of $799 and an overall rating of 7.4, United Airlines is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $1,021 and an overall rating of 6.8.

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

    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 St. Louis to Bucharest.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bucharest from St. Louis 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 St. Louis to Bucharest?

    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 Bucharest with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and OTP can sometimes prove cheaper using this method.

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

    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 Bucharest from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from St. Louis to Bucharest

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Bucharest. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Bucharest? 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.
7.4
United AirlinesOverall score based on 9529 reviews
7.3Comfort
6.6Food
7.1Entertainment
8.1Crew
7.7Boarding
Airline reviews

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

8.0 ExcellentAnonymous, Apr 2026
SMF - DEN
Read more United Airlines reviews

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

Just a bad day to fly. Flight was delayed from scheduled 6:50 pm departure to 8:50 pm. Combination of factors mostly related to weather at the destination airport (which is where the incoming flight originated) which delayed the inbound flight over an hour. Once on board, we taxied but had to hold again on the taxiway for 10 minutes or so. We did not get wheels up until after 9 pm. The flight was smooth but about 18 minutes from our destination, we had to hold for several minutes more due to weather at ORD. We finally landed at ORD about 11:08 pm (accounting for the time difference, that was about a 3 hour delay from our scheduled departure time). It felt like we were never going to get to our destination. But the flight crew and attendants were very good. The movie selection onboard was also very nice. Got to watch half of a movie just during our taxi from the gate at ATL due to the delay!

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

No meal service to the back of the plane as it started late or was too slow to get it out before it was time to land.

Terrible, if possible won't be flying again anytime soon!

Efficient boarding and early departure. Very smooth flight. Early arrival in ATL. Great flight.

We purchase first class seats for the first time for multiples of standard economy ticket. There was no access to the club lounge and no priority boarding. The meal and the service once on the plane were superior and the seat was nicer, but not worth the price difference. I will be happy to seat in economy and spend the difference on more travel.

The business class seat is exceptional. I wish the food is more palatable.

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

the entire flight felt off. The crew seemed uninterested and disengaged. The food service was really bad - overcooked, bland, weird food service. They actually woke us up to serve chicken wraps in the middle of the night, after dinner and before breakfast. Made no sense. Ultimately, I was glad they did though, because the breakfast had been held for so long it was inedible. Eggs, potatoes, sausage - all disgusting. We were asked to "honor" the lavatories for premium customers and stay in our own cabin: this was also strange. So people in economy didn't pay enough to use the closest toilet to them??? It's a toilet. All in all, not the experience I have come to expect from United Airlines. The return flight from Paris to SFO was better, btw.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

I was deceived on the Kayak site expecting a ticket, but instead finding a "standby" reservation. When I tried to change the ticket, I paid almost twice the price of the original ticket. Then, the airline refused to give me the reserved seat I had chosen and paid for. I think I deserve a refund for this leg of my trip because I was doubly charged and did not receive what I had paid for. I put in a complaint with Lufthansa because the ticket was sold originally sold as a flight they listed. Someone here needs to take responsibility.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Everything you need to know for your flight from St. Louis to Bucharest

Information on your arrival and departure airports