STL - OTP

$959 Find Cheap Flights from St. Louis to Bucharest

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Bucharest departing on 7/20. 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
$959
Lufthansa
lun. 7/20vie. 9/11
STL - OTP • 2 stops
Cheapest one-way
$3,599
Lufthansa
jue. 6/18
STL - OTP • 2 stops
Top airlines
Cheapest • from $959 (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
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

lun., jul. 20 - vie., sep. 11
Lufthansa Logo
1:13 pm - 6:35 pm
STL
-
OTP
21h 22m
2 stops
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$959Lufthansa
lun., jul. 20 - vie., sep. 11
Multiple Airlines Logo
3:58 pm - 3:50 pm
STL
-
OTP
15h 52m
2 stops
Multiple Airlines Logo
7:05 am - 6:02 pm
OTP
-
STL
18h 57m
2 stops
$973Multiple Airlines
sáb., jul. 18 - lun., sep. 14
United Airlines Logo
5:33 pm - 6:35 pm
STL
-
OTP
41h 02m
2 stops
United Airlines Logo
6:55 pm - 7:31 pm
OTP
-
STL
32h 36m
2 stops
$996United Airlines
sáb., jul. 18 - lun., sep. 14
United Airlines Logo
5:33 pm - 6:35 pm
STL
-
OTP
41h 02m
2 stops
United Airlines Logo
1:50 pm - 1:25 pm
OTP
-
STL
31h 35m
1 stop
$998United Airlines
lun., jul. 20 - vie., sep. 11
Lufthansa Logo
3:30 pm - 11:50 pm
STL
-
OTP
24h 20m
1 stop
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$1,056Lufthansa
mar., jun. 9 - mar., jun. 16
Multiple Airlines Logo
10:15 am - 2:40 pm
STL
-
OTP
20h 25m
2 stops
Multiple Airlines Logo
8:35 am - 8:30 pm
OTP
-
STL
19h 55m
2 stops
$1,064Multiple Airlines
jue., jul. 16 - dom., sep. 13
Multiple Airlines Logo
12:10 pm - 6:35 pm
STL
-
OTP
22h 25m
2 stops
Multiple Airlines Logo
5:35 pm - 1:25 pm
OTP
-
STL
27h 50m
1 stop
$1,082Multiple Airlines
mié., may. 27 - mié., jun. 3
United Airlines Logo
12:55 pm - 12:00 pm
STL
-
OTP
15h 05m
2 stops
United Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$1,093United Airlines
mié., may. 27 - mié., jun. 3
United Airlines Logo
12:55 pm - 12:00 pm
STL
-
OTP
15h 05m
2 stops
United Airlines Logo
6:05 am - 8:25 pm
OTP
-
STL
22h 20m
2 stops
$1,097United Airlines
jue., jul. 16 - dom., sep. 13
United Airlines Logo
8:00 am - 1:00 pm
STL
-
OTP
21h 00m
2 stops
United Airlines Logo
2:05 pm - 8:00 pm
OTP
-
STL
37h 55m
2 stops
$1,107United Airlines
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 ($959) and United Airlines ($996).

Good to know

Cheapest flight$959
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 $3,599 for a one-way ticket and $959 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 $804 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 9677 reviews
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
6.6Food
Airline reviews

Some crew were unfriendly or in some cases just straight up rude.

6.0 GoodAnonymous, Apr 2026
SFO - YVR
Read more United Airlines reviews

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

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.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

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.

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

Information on your arrival and departure airports