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Cheap flights from Bucharest Otopeni Intl Airport to St. Louis from $564

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Bucharest Otopeni Intl Airport to St. Louis departing on 10/1. 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

Find the cheapest flights from Bucharest Otopeni Intl Airport to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:05 am - 11:58 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
24h 53m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
Delta Logo
5:34 pm - 5:40 pmSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
16h 06m2 stops Minneapolis St Paul Amsterdam Schiphol
$883Delta
Fri, Aug 28 - Tue, Sep 1
Multiple Airlines Logo
7:05 am - 5:38 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
18h 33m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County
Multiple Airlines Logo
3:39 pm - 3:50 pmSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
16h 11m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle
$901Multiple Airlines
Wed, Aug 26 - Sun, Aug 30
Multiple Airlines Logo
12:45 pm - 12:14 amOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
43h 29m2 stops Madrid Barajas Chicago O'Hare Intl
Multiple Airlines Logo
9:40 pm - 12:50 amSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
19h 10m1 stop London Heathrow
$1,000Multiple Airlines
Wed, Aug 26 - Sun, Aug 30
British Airways Logo
8:15 am - 11:34 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
23h 19m2 stops London Heathrow Philadelphia
British Airways Logo
9:35 pm - 1:20 amSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
19h 45m1 stop London Heathrow
$1,011British Airways
Fri, Aug 28 - Tue, Sep 1
British Airways Logo
8:15 am - 10:05 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
21h 50m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
12:55 pm - 3:30 pmSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
18h 35m2 stops Dallas/Fort Worth London Heathrow
$1,093British Airways
Thu, Jan 21 - Mon, Jan 25
British Airways Logo
8:05 am - 11:34 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
23h 29m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
1:06 pm - 3:45 pmSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
18h 39m2 stops Chicago O'Hare Intl London Heathrow
$1,094British Airways
Sat, Jan 23 - Wed, Jan 27
British Airways Logo
8:15 am - 10:05 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
21h 50m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
1:06 pm - 3:30 pmSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
18h 24m2 stops Chicago O'Hare Intl London Heathrow
$1,094British Airways
Thu, Jan 21 - Mon, Jan 25
British Airways Logo
7:35 am - 7:41 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
20h 06m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
1:06 pm - 3:45 pmSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
18h 39m2 stops Chicago O'Hare Intl London Heathrow
$1,095British Airways
Sat, Jan 23 - Wed, Jan 27
British Airways Logo
8:05 am - 11:34 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
23h 29m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
1:06 pm - 3:45 pmSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
18h 39m2 stops Chicago O'Hare Intl London Heathrow
$1,095British Airways
Sat, Jan 23 - Wed, Jan 27
British Airways Logo
8:15 am - 7:30 pmOTP  Bucharest Otopeni Intl-STL Lambert-St Louis
19h 15m1 stop London Heathrow
British Airways Logo
9:40 pm - 12:50 amSTL  Lambert-St Louis-OTP Bucharest Otopeni Intl
19h 10m1 stop London Heathrow
$1,099British Airways
Wed, Aug 26 - Sun, Aug 30

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

Our best British Airways deals on Bucharest Otopeni Intl Airport to St. Louis flight tickets
British Airways
Aug 28
OTP8:15 amBucharest Otopeni Intl
23h 19m
2 stops
STL11:34 pmLambert-St Louis
Sep 1
STL9:35 pmLambert-St Louis
19h 45m
1 stop
OTP1:20 amBucharest Otopeni Intl
$1,011
British Airways
Jan 21
OTP8:15 amBucharest Otopeni Intl
21h 50m
2 stops
STL10:05 pmLambert-St Louis
Jan 25
STL12:55 pmLambert-St Louis
18h 35m
2 stops
OTP3:30 pmBucharest Otopeni Intl
$1,093
British Airways
Jan 21
OTP8:15 amBucharest Otopeni Intl
21h 50m
2 stops
STL10:05 pmLambert-St Louis
Jan 25
STL1:06 pmLambert-St Louis
18h 24m
2 stops
OTP3:30 pmBucharest Otopeni Intl
$1,094

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

Our best United Airlines deals on Bucharest Otopeni Intl Airport to St. Louis flight tickets
United Airlines
Aug 26
OTP6:05 amBucharest Otopeni Intl
15h 20m
1 stop
STL1:25 pmLambert-St Louis
Aug 30
STL3:30 pmLambert-St Louis
17h 00m
1 stop
OTP4:30 pmBucharest Otopeni Intl
$1,115
United Airlines
Aug 26
OTP6:05 amBucharest Otopeni Intl
17h 33m
2 stops
STL3:38 pmLambert-St Louis
Aug 30
STL12:59 pmLambert-St Louis
16h 06m
2 stops
OTP1:05 pmBucharest Otopeni Intl
$1,120
United Airlines
Jan 23
OTP6:00 amBucharest Otopeni Intl
21h 29m
2 stops
STL7:29 pmLambert-St Louis
Jan 27
STL3:40 pmLambert-St Louis
14h 15m
1 stop
OTP1:55 pmBucharest Otopeni Intl
$1,298

momondo Fare Finder

 
Customize your flight search to find flights from Bucharest Otopeni Intl Airport to St. Louis 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 August 15, 2026.
Use the filters below to find and compare flights from Bucharest Otopeni Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Fri 8/28

7:05 am-11:58 pm

2 stops24h 53m

Lambert-St Louis

Tue 9/1

5:34 pm-5:40 pm

2 stops16h 06m

$883
Quickest round-trip

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Wed 8/26

7:05 am-5:38 pm

2 stops18h 33m

Lambert-St Louis

Sun 8/30

3:39 pm-3:50 pm

2 stops16h 11m

$901

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Wed 8/26

12:45 pm-12:14 am

2 stops43h 29m

Lambert-St Louis

Sun 8/30

9:40 pm-12:50 am

1 stop19h 10m

$1,000

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Fri 8/28

8:15 am-11:34 pm

2 stops23h 19m

Lambert-St Louis

Tue 9/1

9:35 pm-1:20 am

1 stop19h 45m

$1,011

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Thu 1/21

8:15 am-10:05 pm

2 stops21h 50m

Lambert-St Louis

Mon 1/25

12:55 pm-3:30 pm

2 stops18h 35m

$1,093

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Sat 1/23

8:05 am-11:34 pm

2 stops23h 29m

Lambert-St Louis

Wed 1/27

1:06 pm-3:45 pm

2 stops18h 39m

$1,094

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Thu 1/21

8:15 am-10:05 pm

2 stops21h 50m

Lambert-St Louis

Mon 1/25

1:06 pm-3:30 pm

2 stops18h 24m

$1,094

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Sat 1/23

7:35 am-7:41 pm

2 stops20h 06m

Lambert-St Louis

Wed 1/27

1:06 pm-3:45 pm

2 stops18h 39m

$1,095

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Sat 1/23

8:05 am-11:34 pm

2 stops23h 29m

Lambert-St Louis

Wed 1/27

1:06 pm-3:45 pm

2 stops18h 39m

$1,095

BucharestSt. Louis

OTP Bucharest Otopeni Intl - STL Lambert-St Louis

OTPSTL

Bucharest Otopeni Intl

Wed 8/26

8:15 am-7:30 pm

1 stop19h 15m

Lambert-St Louis

Sun 8/30

9:40 pm-12:50 am

1 stop19h 10m

$1,099

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Bucharest Otopeni Intl Airport to St. Louis

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 Bucharest Otopeni Intl Airport to St. Louis flights?

You could potentially save up to 39% on your flight if you consider stops on a Bucharest Otopeni Intl Airport to St. Louis flight.

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

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

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

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

Fastest flight time

18h 48m

Direct flights

None
The fastest flight from Bucharest Otopeni Intl Airport to St. Louis takes 18h 48m
There are no direct flights from Bucharest Otopeni Intl Airport to St. Louis. There are no popular flight routes from Bucharest Otopeni Intl Airport to St. Louis.
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Frequently asked questions about flying from Bucharest Otopeni Intl Airport to St. Louis

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

    Lambert-St Louis is 5451.7 mi away from Bucharest Otopeni Intl. A reasonable flight in good conditions will take 18h 48m.

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Bucharest Otopeni Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis 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 Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
St. Peters
Maryland Heights
Collinsville
Florissant
Alton
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Bucharest to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Bucharest to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from Bucharest to St. Louis with flexible booking policies on momondo?

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

How can momondo help me find flights from Bucharest to St. Louis?

momondo helps you find the best flight between Bucharest and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Bucharest to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Bucharest and alert you when they change.

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