STL - OTP

$979 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 5/1. 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
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Everything you should know

Cheapest round-trip
$979
Air Canada
Sat 10/3Sat 10/10
STL - OTP • 2 stops
Cheapest one-way
$650
British Airways
Fri 5/1
STL - OTP • 1 stop
Top airlines
Cheapest • from $979 (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 00m (one-way)
Insights
Insights
Insights
Insights
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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

Sat, Oct 3 - Sat, Oct 10
Air Canada Logo
2:40 pm - 3:20 pm
STL
-
OTP
40h 40m
2 stops
Air Canada Logo
6:05 am - 6:41 pm
OTP
-
STL
20h 36m
2 stops
$979Air Canada
Sat, Oct 3 - Sat, Oct 10
British Airways Logo
8:07 pm - 12:50 am
STL
-
OTP
44h 43m
2 stops
British Airways Logo
8:00 pm - 7:30 pm
OTP
-
STL
31h 30m
1 stop
$1,050British Airways
Wed, May 27 - Sat, Jun 6
United Airlines Logo
5:10 am - 6:35 pm
STL
-
OTP
29h 25m
2 stops
United Airlines Logo
6:15 am - 12:06 pm
OTP
-
STL
37h 51m
2 stops
$1,162United Airlines
Thu, Jun 4 - Thu, Jun 11
Air Canada Logo
2:15 pm - 3:20 pm
STL
-
OTP
17h 05m
2 stops
Air Canada Logo
6:05 am - 8:25 pm
OTP
-
STL
22h 20m
2 stops
$1,172Air Canada
Fri, Jun 5 - Fri, Jun 12
Air Canada Logo
2:15 pm - 6:35 pm
STL
-
OTP
20h 20m
2 stops
Air Canada Logo
6:15 am - 12:06 pm
OTP
-
STL
37h 51m
2 stops
$1,176Air Canada
Wed, May 27 - Sat, Jun 6
Multiple Airlines Logo
7:05 am - 10:55 pm
STL
-
OTP
31h 50m
3 stops
Multiple Airlines Logo
7:40 am - 8:25 pm
OTP
-
STL
44h 45m
3 stops
$1,220Multiple Airlines
Wed, May 20 - Sat, May 30
Delta Logo
11:25 am - 1:00 pm
STL
-
OTP
17h 35m
2 stops
Delta Logo
6:00 am - 11:21 pm
OTP
-
STL
25h 21m
2 stops
$1,224Delta
Fri, Jun 5 - Fri, Jun 12
Multiple Airlines Logo
2:15 pm - 6:35 pm
STL
-
OTP
20h 20m
2 stops
Multiple Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$1,264Multiple Airlines
Thu, Jun 4 - Thu, Jun 11
Multiple Airlines Logo
2:15 pm - 3:20 pm
STL
-
OTP
17h 05m
2 stops
Multiple Airlines Logo
1:45 pm - 1:25 pm
OTP
-
STL
31h 40m
1 stop
$1,283Multiple Airlines
Wed, Jul 1 - Fri, Jul 31
British Airways Logo
1:45 pm - 2:35 pm
STL
-
OTP
16h 50m
2 stops
British Airways Logo
8:15 am - 8:29 pm
OTP
-
STL
20h 14m
2 stops
$1,368British Airways
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 Air Canada ($979) and British Airways ($1,050).

Good to know

Cheapest flight$650
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 $650 for a one-way ticket and $979 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 $1,040 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 9635 reviews
7.7Boarding
6.6Food
7.1Entertainment
7.3Comfort
8.1Crew
Airline reviews

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

10.0 ExcellentAnonymous, Apr 2026
LAX - FRA
Read more United Airlines reviews

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was delayed from take off because only one runway was operational in San Francisco.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

The flight was significantly delayed. The inbound flight from EWR was delayed departing because of mechanical problems. My original departure from CLT was 5:28 pm but due to the delay of the inbound flight, after arrival, deplaning, cleaning, boarding, we did not push back from the gate until 9:00 pm. Once in the air, the flight was smooth and what was originally supposed to be an arrival in ORD at 7:30 pm local time turned out to be 9:35 pm.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

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.

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

Information on your arrival and departure airports