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Cheap flights from St. Louis to Bucharest from $889

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bucharest departing on 9/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Bucharest

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
12:59 pm - 1:10 am
STL
-
OTP
28h 11m
2 stops
Lufthansa Logo
6:05 am - 9:21 pm
OTP
-
STL
23h 16m
2 stops
$889Lufthansa
Sun, Sep 13 - Fri, Oct 2
American Airlines Logo
1:49 pm - 2:05 pm
STL
-
OTP
16h 16m
2 stops
American Airlines Logo
8:15 am - 9:43 pm
OTP
-
STL
21h 28m
2 stops
$896American Airlines
Sun, Sep 13 - Fri, Oct 2
Multiple Airlines Logo
3:40 pm - 3:50 pm
STL
-
OTP
16h 10m
2 stops
Multiple Airlines Logo
8:35 am - 7:58 pm
OTP
-
STL
19h 23m
2 stops
$898Multiple Airlines
Sun, Sep 13 - Fri, Oct 2
United Airlines Logo
8:40 am - 4:20 pm
STL
-
OTP
23h 40m
2 stops
United Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$902United Airlines
Tue, Sep 1 - Tue, Sep 8
American Airlines Logo
8:07 pm - 1:20 am
STL
-
OTP
21h 13m
2 stops
American Airlines Logo
8:15 am - 12:14 am
OTP
-
STL
23h 59m
2 stops
$902American Airlines
Tue, Sep 1 - Tue, Sep 8
Lufthansa Logo
3:30 pm - 4:20 pm
STL
-
OTP
16h 50m
1 stop
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$946Lufthansa
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
6:50 pm - 6:35 pm
STL
-
OTP
39h 45m
2 stops
United Airlines Logo
7:10 pm - 11:25 pm
OTP
-
STL
36h 15m
2 stops
$966United Airlines
Sun, Nov 29 - Wed, Dec 2
United Airlines Logo
7:00 am - 6:35 pm
STL
-
OTP
27h 35m
3 stops
United Airlines Logo
6:55 pm - 11:38 pm
OTP
-
STL
36h 43m
2 stops
$975United Airlines
Wed, Sep 2 - Sun, Sep 20
Lufthansa Logo
3:30 pm - 4:30 pm
STL
-
OTP
17h 00m
1 stop
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$1,036Lufthansa
Sun, Sep 13 - Fri, Oct 2
Lufthansa Logo
3:30 pm - 4:30 pm
STL
-
OTP
17h 00m
1 stop
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$1,038Lufthansa
Sun, Sep 13 - Fri, Oct 2

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British Airways flights from St. Louis to Bucharest Otopeni Intl Airport

Our best British Airways deals on St. Louis to Bucharest Otopeni Intl Airport flight tickets
British Airways
Sep 13
STL9:40 pmLambert-St Louis
19h 10m
1 stop
OTP12:50 amBucharest Otopeni Intl
Oct 2
OTP8:15 amBucharest Otopeni Intl
21h 28m
2 stops
STL9:43 pmLambert-St Louis
$917
British Airways
Sep 13
STL9:40 pmLambert-St Louis
19h 10m
1 stop
OTP12:50 amBucharest Otopeni Intl
Oct 2
OTP8:15 amBucharest Otopeni Intl
21h 28m
2 stops
STL9:43 pmLambert-St Louis
$922
British Airways
Oct 19
STL11:21 amLambert-St Louis
21h 59m
2 stops
OTP5:20 pmBucharest Otopeni Intl
Oct 23
OTP8:15 amBucharest Otopeni Intl
23h 43m
2 stops
STL11:58 pmLambert-St Louis
$1,021

United Airlines flights from St. Louis to Bucharest Otopeni Intl Airport

Our best United Airlines deals on St. Louis to Bucharest Otopeni Intl Airport flight tickets
United Airlines
Sep 1
STL8:40 amLambert-St Louis
23h 40m
2 stops
OTP4:20 pmBucharest Otopeni Intl
Sep 8
OTP6:05 amBucharest Otopeni Intl
15h 20m
1 stop
STL1:25 pmLambert-St Louis
$902
United Airlines
Nov 29
STL6:50 pmLambert-St Louis
39h 45m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Dec 2
OTP7:10 pmBucharest Otopeni Intl
36h 15m
2 stops
STL11:25 pmLambert-St Louis
$966
United Airlines
Sep 2
STL7:00 amLambert-St Louis
27h 35m
3 stops
OTP6:35 pmBucharest Otopeni Intl
Sep 20
OTP6:55 pmBucharest Otopeni Intl
36h 43m
2 stops
STL11:38 pmLambert-St Louis
$975

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Bucharest Otopeni Intl Airport 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 July 29, 2026.
Use the filters below to find and compare flights from St. Louis to Bucharest Otopeni Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/13

12:59 pm-1:10 am

2 stops28h 11m

Bucharest Otopeni Intl

Fri 10/2

6:05 am-9:21 pm

2 stops23h 16m

$889

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/13

1:49 pm-2:05 pm

2 stops16h 16m

Bucharest Otopeni Intl

Fri 10/2

8:15 am-9:43 pm

2 stops21h 28m

$896

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/13

3:40 pm-3:50 pm

2 stops16h 10m

Bucharest Otopeni Intl

Fri 10/2

8:35 am-7:58 pm

2 stops19h 23m

$898

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 9/1

8:40 am-4:20 pm

2 stops23h 40m

Bucharest Otopeni Intl

Tue 9/8

6:05 am-1:25 pm

1 stop15h 20m

$902

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 9/1

8:07 pm-1:20 am

2 stops21h 13m

Bucharest Otopeni Intl

Tue 9/8

8:15 am-12:14 am

2 stops23h 59m

$902
Quickest round-trip

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 9/1

3:30 pm-4:20 pm

1 stop16h 50m

Bucharest Otopeni Intl

Tue 9/8

6:05 am-1:25 pm

1 stop15h 20m

$946

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 11/29

6:50 pm-6:35 pm

2 stops39h 45m

Bucharest Otopeni Intl

Wed 12/2

7:10 pm-11:25 pm

2 stops36h 15m

$966

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/2

7:00 am-6:35 pm

3 stops27h 35m

Bucharest Otopeni Intl

Sun 9/20

6:55 pm-11:38 pm

2 stops36h 43m

$975

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/13

3:30 pm-4:30 pm

1 stop17h 00m

Bucharest Otopeni Intl

Fri 10/2

6:05 am-1:25 pm

1 stop15h 20m

$1,036

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/13

3:30 pm-4:30 pm

1 stop17h 00m

Bucharest Otopeni Intl

Fri 10/2

6:05 am-1:25 pm

1 stop15h 20m

$1,038

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from St. Louis to Bucharest Otopeni Intl Airport

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 St. Louis to Bucharest Otopeni Intl Airport flights?

You could potentially save up to 45% on your flight if you consider stops on a St. Louis to Bucharest Otopeni Intl Airport flight.

When to book flights from St. Louis to Bucharest Otopeni Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Bucharest Otopeni Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Bucharest Otopeni Intl Airport (STL to OTP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Bucharest Otopeni Intl Airport

Fastest flight time

14h 15m

Direct flights

None
The fastest flight from St. Louis to Bucharest Otopeni Intl Airport takes 14h 15m
There are no direct flights from St. Louis to Bucharest Otopeni Intl Airport. There are no popular flight routes from St. Louis to Bucharest Otopeni Intl Airport.
Search flight deals

Frequently asked questions about flying from St. Louis to Bucharest Otopeni Intl Airport

  • How far is Lambert-St Louis to Bucharest Otopeni Intl by plane?

    The straight-line distance from Lambert-St Louis to Bucharest Otopeni Intl is 5451.7 mi. In terms of flight time, this usually takes a little over 14h 15m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Bucharest Otopeni Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Bucharest Otopeni Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Bucharest Otopeni Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Bucharest Otopeni Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Bucharest Otopeni Intl Airport.

  • What documentation or ID do you need to fly to Bucharest Otopeni Intl Airport?

    The travel and health documents you'll need for your trip to Bucharest Otopeni Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bucharest Otopeni Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Bucharest Otopeni Intl Airport?

Best airlines flying from St. Louis to Bucharest Otopeni Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Bucharest Otopeni Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $574Free CancellationRating
7.4
10,048 reviews
Search United Airlines flights
LufthansaPriceFrom $800Free CancellationRating
6.8
8,164 reviews
Search Lufthansa flights

Traveling to a place near Bucharest?

Book flights to Bucharest if you plan to visit one of these locations
Otopeni

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Yes. momondo enables you to select and highlight flights to Bucharest from St. Louis with this policy.

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