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Cheap flights from St. Louis to Bucharest from $419

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bucharest departing on 7/10. 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
3:30 pm - 12:50 pm
STL
-
OTP
13h 20m
1 stop
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$870Lufthansa
Wed, Sep 2 - Wed, Sep 9
Multiple Airlines Logo
3:30 pm - 4:20 pm
STL
-
OTP
16h 50m
1 stop
Multiple Airlines Logo
6:20 am - 6:41 pm
OTP
-
STL
20h 21m
2 stops
$883Multiple Airlines
Wed, Sep 2 - Wed, Sep 9
United Airlines Logo
7:00 am - 6:35 pm
STL
-
OTP
27h 35m
3 stops
United Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$887United Airlines
Wed, Sep 2 - Wed, Sep 9
Multiple Airlines Logo
2:40 pm - 12:40 am
STL
-
OTP
26h 00m
2 stops
Multiple Airlines Logo
8:35 pm - 8:00 pm
OTP
-
STL
31h 25m
3 stops
$1,293Multiple Airlines
Wed, Sep 2 - Wed, Sep 9
British Airways Logo
3:55 pm - 12:50 am
STL
-
OTP
48h 55m
2 stops
British Airways Logo
8:15 am - 11:32 pm
OTP
-
STL
47h 17m
2 stops
$1,363British Airways
Sat, Jul 4 - Mon, Jul 13
Multiple Airlines Logo
2:40 pm - 3:20 pm
STL
-
OTP
40h 40m
2 stops
Multiple Airlines Logo
5:15 pm - 1:25 pm
OTP
-
STL
28h 10m
1 stop
$1,481Multiple Airlines
Sat, Jul 4 - Mon, Jul 13
Multiple Airlines Logo
12:10 pm - 4:15 pm
STL
-
OTP
20h 05m
3 stops
Multiple Airlines Logo
7:20 pm - 2:00 pm
OTP
-
STL
26h 40m
3 stops
$1,510Multiple Airlines
Wed, Sep 2 - Wed, Sep 9
Multiple Airlines Logo
2:40 pm - 1:35 am
STL
-
OTP
26h 55m
3 stops
Multiple Airlines Logo
8:35 pm - 8:22 pm
OTP
-
STL
31h 47m
2 stops
$1,561Multiple Airlines
Sat, Jul 4 - Mon, Jul 13

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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 June 16, 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
Quickest round-trip

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/2

3:30 pm-12:50 pm

1 stop13h 20m

Bucharest Otopeni Intl

Wed 9/9

6:05 am-1:25 pm

1 stop15h 20m

$870

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/2

3:30 pm-4:20 pm

1 stop16h 50m

Bucharest Otopeni Intl

Wed 9/9

6:20 am-6:41 pm

2 stops20h 21m

$883

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/2

7:00 am-6:35 pm

3 stops27h 35m

Bucharest Otopeni Intl

Wed 9/9

6:05 am-1:25 pm

1 stop15h 20m

$887

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/2

2:40 pm-12:40 am

2 stops26h 00m

Bucharest Otopeni Intl

Wed 9/9

8:35 pm-8:00 pm

3 stops31h 25m

$1,293

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sat 7/4

3:55 pm-12:50 am

2 stops48h 55m

Bucharest Otopeni Intl

Mon 7/13

8:15 am-11:32 pm

2 stops47h 17m

$1,363

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sat 7/4

2:40 pm-3:20 pm

2 stops40h 40m

Bucharest Otopeni Intl

Mon 7/13

5:15 pm-1:25 pm

1 stop28h 10m

$1,481

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/2

12:10 pm-4:15 pm

3 stops20h 05m

Bucharest Otopeni Intl

Wed 9/9

7:20 pm-2:00 pm

3 stops26h 40m

$1,510

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sat 7/4

2:40 pm-1:35 am

3 stops26h 55m

Bucharest Otopeni Intl

Mon 7/13

8:35 pm-8:22 pm

2 stops31h 47m

$1,561
Cheapest one-way

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 7/10

4:57 pm-10:50 pm

3 stops45h 53m

$419

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 7/14

4:09 pm-9:40 am

3 stops57h 31m

$424

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted 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 42% 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

13h 20m

Direct flights

None
The fastest flight from St. Louis to Bucharest Otopeni Intl Airport takes 13h 20m
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.
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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 13h 20m.

  • 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
9,844 reviews
Search United Airlines flights
LufthansaPriceFrom $800Free CancellationRating
6.8
8,066 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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