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Cheap flights from St. Louis to Bucharest from $542

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 12/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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Multiple Airlines Logo
4:05 pm - 3:50 pmSTL-OTP
15h 45m2 stops
Multiple Airlines Logo
6:05 am - 1:55 pmOTP-STL
15h 50m1 stop
$542Multiple Airlines
Find Deal
mié., dic. 10 - mié., ene. 21
Multiple Airlines Logo
4:05 pm - 3:50 pmSTL-OTP
15h 45m2 stops
Multiple Airlines Logo
5:55 am - 3:29 pmOTP-STL
41h 34m2 stops
$548Multiple Airlines
Find Deal
mié., dic. 10 - sáb., ene. 17
Air Canada Logo
4:05 pm - 3:50 pmSTL-OTP
15h 45m2 stops
Air Canada Logo
6:30 am - 10:58 pmOTP-STL
24h 28m3 stops
$561Air Canada
Find Deal
mié., dic. 10 - mié., ene. 21
Air Canada Logo
4:05 pm - 3:50 pmSTL-OTP
15h 45m2 stops
Air Canada Logo
6:55 am - 9:13 pmOTP-STL
22h 18m3 stops
$575Air Canada
Find Deal
mié., dic. 10 - sáb., ene. 17
Air Canada Logo
4:05 pm - 6:35 pmSTL-OTP
19h 30m2 stops
Air Canada Logo
1:50 pm - 3:24 pmOTP-STL
33h 34m2 stops
$646Air Canada
Find Deal
vie., mar. 27 - mar., mar. 31
United Airlines Logo
4:50 pm - 2:10 pmSTL-OTP
14h 20m1 stop
United Airlines Logo
1:50 pm - 3:24 pmOTP-STL
33h 34m2 stops
$653United Airlines
Find Deal
vie., mar. 27 - mar., mar. 31
Lufthansa Logo
3:50 pm - 2:00 pmSTL-OTP
14h 10m1 stop
Lufthansa Logo
6:05 am - 1:55 pmOTP-STL
15h 50m1 stop
$659Lufthansa
Find Deal
mié., dic. 10 - mié., ene. 21
Lufthansa Logo
4:50 pm - 2:10 pmSTL-OTP
14h 20m1 stop
Lufthansa Logo
5:45 pm - 1:30 pmOTP-STL
27h 45m1 stop
$667Lufthansa
Find Deal
vie., mar. 27 - mar., mar. 31
Lufthansa Logo
3:50 pm - 2:00 pmSTL-OTP
14h 10m1 stop
Lufthansa Logo
2:50 pm - 1:55 pmOTP-STL
31h 05m1 stop
$754Lufthansa
Find Deal
mié., dic. 10 - sáb., ene. 17
British Airways Logo
2:50 pm - 3:10 pmSTL-OTP
16h 20m2 stops
British Airways Logo
8:00 am - 10:44 pmOTP-STL
22h 44m2 stops
$816British Airways
Find Deal
vie., dic. 26 - vie., ene. 16

Air Canada flights from St. Louis to Bucharest Otopeni Intl Airport

Our best Air Canada deals on St. Louis to Bucharest Otopeni Intl Airport flight tickets
Air Canada
Dec 10
STL4:05 pmLambert-St Louis
15h 45m
2 stops
OTP3:50 pmBucharest Otopeni Intl
Jan 21
OTP6:30 amBucharest Otopeni Intl
24h 28m
3 stops
STL10:58 pmLambert-St Louis
$561
Find similar
Air Canada
Dec 10
STL4:05 pmLambert-St Louis
15h 45m
2 stops
OTP3:50 pmBucharest Otopeni Intl
Jan 17
OTP6:55 amBucharest Otopeni Intl
22h 18m
3 stops
STL9:13 pmLambert-St Louis
$575
Find similar
Air Canada
Mar 27
STL4:05 pmLambert-St Louis
19h 30m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Mar 31
OTP1:50 pmBucharest Otopeni Intl
33h 34m
2 stops
STL3:24 pmLambert-St Louis
$646
Find similar

Lufthansa flights from St. Louis to Bucharest Otopeni Intl Airport

Our best Lufthansa deals on St. Louis to Bucharest Otopeni Intl Airport flight tickets
Lufthansa
Dec 10
STL3:50 pmLambert-St Louis
14h 10m
1 stop
OTP2:00 pmBucharest Otopeni Intl
Jan 21
OTP6:05 amBucharest Otopeni Intl
15h 50m
1 stop
STL1:55 pmLambert-St Louis
$659
Find similar
Lufthansa
Mar 27
STL4:50 pmLambert-St Louis
14h 20m
1 stop
OTP2:10 pmBucharest Otopeni Intl
Mar 31
OTP5:45 pmBucharest Otopeni Intl
27h 45m
1 stop
STL1:30 pmLambert-St Louis
$667
Find similar
Lufthansa
Dec 10
STL3:50 pmLambert-St Louis
14h 10m
1 stop
OTP2:00 pmBucharest Otopeni Intl
Jan 17
OTP2:50 pmBucharest Otopeni Intl
31h 05m
1 stop
STL1:55 pmLambert-St Louis
$754
Find similar

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 octubre 14, 2025.
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

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

mié. 12/10

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

mié. 1/21

6:05 am-1:55 pm

1 stop15h 50m

$542

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

mié. 12/10

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

sáb. 1/17

5:55 am-3:29 pm

2 stops41h 34m

$548

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

mié. 12/10

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

mié. 1/21

6:30 am-10:58 pm

3 stops24h 28m

$561

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

mié. 12/10

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

sáb. 1/17

6:55 am-9:13 pm

3 stops22h 18m

$575

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

vie. 3/27

4:05 pm-6:35 pm

2 stops19h 30m

Bucharest Otopeni Intl

mar. 3/31

1:50 pm-3:24 pm

2 stops33h 34m

$646

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

vie. 3/27

4:50 pm-2:10 pm

1 stop14h 20m

Bucharest Otopeni Intl

mar. 3/31

1:50 pm-3:24 pm

2 stops33h 34m

$653

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

mié. 12/10

3:50 pm-2:00 pm

1 stop14h 10m

Bucharest Otopeni Intl

mié. 1/21

6:05 am-1:55 pm

1 stop15h 50m

$659

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

vie. 3/27

4:50 pm-2:10 pm

1 stop14h 20m

Bucharest Otopeni Intl

mar. 3/31

5:45 pm-1:30 pm

1 stop27h 45m

$667

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

mié. 12/10

3:50 pm-2:00 pm

1 stop14h 10m

Bucharest Otopeni Intl

sáb. 1/17

2:50 pm-1:55 pm

1 stop31h 05m

$754

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

vie. 12/26

2:50 pm-3:10 pm

2 stops16h 20m

Bucharest Otopeni Intl

vie. 1/16

8:00 am-10:44 pm

2 stops22h 44m

$816

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Bucharest from

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

What is the cheapest day to depart on your flight to Bucharest Otopeni Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Bucharest Otopeni Intl Airport. Tickets to fly out on this day can be as low as $1,002. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Bucharest Otopeni Intl Airport for around $1,526.

What is the cheapest time of day to depart on your flight to Bucharest Otopeni Intl Airport?

Our most recent data shows that the best time of day to fly to Bucharest Otopeni Intl Airport is at noon. Flights from St. Louis to Bucharest Otopeni Intl Airport during this time can be as low as $1,002. In the afternoon is when there is more demand to fly to Bucharest Otopeni Intl Airport, so prices are often more expensive at around $1,184 per ticket.

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

Direct flights

None
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

  • 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 10m.

  • 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
LufthansaPriceFrom $780Free CancellationRating
6.8
7,489 reviews
Search Lufthansa flights
United AirlinesPriceFrom $784Free CancellationRating
7.4
8,976 reviews
Search United Airlines 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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