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Cheap flights from Bucharest Otopeni Intl Airport to St. Louis from $664

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 8/15. 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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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.
United Airlines Logo
6:05 am - 11:44 pm
OTP
-
STL
25h 39m
2 stops
United Airlines Logo
12:59 pm - 12:00 pm
STL
-
OTP
15h 01m
2 stops
$865United Airlines
Wed, Jul 29 - Wed, Aug 12
Lufthansa Logo
6:05 am - 11:44 pm
OTP
-
STL
25h 39m
2 stops
Lufthansa Logo
3:30 pm - 12:50 pm
STL
-
OTP
13h 20m
1 stop
$875Lufthansa
Wed, Jul 29 - Wed, Aug 12
Multiple Airlines Logo
7:05 am - 5:16 pm
OTP
-
STL
18h 11m
2 stops
Multiple Airlines Logo
1:59 pm - 3:50 pm
STL
-
OTP
17h 51m
2 stops
$886Multiple Airlines
Fri, May 29 - Tue, Jun 2
Delta Logo
7:05 am - 11:21 pm
OTP
-
STL
24h 16m
2 stops
Delta Logo
1:59 pm - 5:20 pm
STL
-
OTP
19h 21m
2 stops
$888Delta
Sat, May 30 - Wed, Jun 3
Delta Logo
7:05 am - 9:09 pm
OTP
-
STL
22h 04m
2 stops
Delta Logo
5:45 pm - 12:45 pm
STL
-
OTP
35h 00m
2 stops
$908Delta
Fri, May 29 - Tue, Jun 2
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
Lufthansa Logo
3:30 pm - 12:50 pm
STL
-
OTP
13h 20m
1 stop
$1,099Lufthansa
Wed, Jul 29 - Wed, Aug 12
United Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
United Airlines Logo
5:29 pm - 11:40 pm
STL
-
OTP
22h 11m
2 stops
$1,104United Airlines
Mon, Jun 1 - Fri, Jun 5
United Airlines Logo
6:05 am - 11:29 pm
OTP
-
STL
25h 24m
2 stops
United Airlines Logo
5:29 pm - 11:40 pm
STL
-
OTP
22h 11m
2 stops
$1,110United Airlines
Mon, Jun 1 - Fri, Jun 5
Lufthansa Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
Lufthansa Logo
1:13 pm - 1:00 pm
STL
-
OTP
15h 47m
2 stops
$1,115Lufthansa
Fri, May 29 - Tue, Jun 2
Multiple Airlines Logo
5:35 am - 8:09 pm
OTP
-
STL
22h 34m
3 stops
Multiple Airlines Logo
3:30 pm - 11:15 pm
STL
-
OTP
23h 45m
2 stops
$1,145Multiple Airlines
Fri, May 29 - Tue, Jun 2

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
Jul 29
OTP6:05 amBucharest Otopeni Intl
25h 39m
2 stops
STL11:44 pmLambert-St Louis
Aug 12
STL12:59 pmLambert-St Louis
15h 01m
2 stops
OTP12:00 pmBucharest Otopeni Intl
$865
United Airlines
Jun 1
OTP6:05 amBucharest Otopeni Intl
15h 20m
1 stop
STL1:25 pmLambert-St Louis
Jun 5
STL5:29 pmLambert-St Louis
22h 11m
2 stops
OTP11:40 pmBucharest Otopeni Intl
$1,104
United Airlines
Jun 1
OTP6:05 amBucharest Otopeni Intl
25h 24m
2 stops
STL11:29 pmLambert-St Louis
Jun 5
STL5:29 pmLambert-St Louis
22h 11m
2 stops
OTP11:40 pmBucharest Otopeni Intl
$1,110

Lufthansa flights from Bucharest Otopeni Intl Airport to St. Louis

Our best Lufthansa deals on Bucharest Otopeni Intl Airport to St. Louis flight tickets
Lufthansa
Jul 29
OTP6:05 amBucharest Otopeni Intl
25h 39m
2 stops
STL11:44 pmLambert-St Louis
Aug 12
STL3:30 pmLambert-St Louis
13h 20m
1 stop
OTP12:50 pmBucharest Otopeni Intl
$875
Lufthansa
Jul 29
OTP6:05 amBucharest Otopeni Intl
15h 20m
1 stop
STL1:25 pmLambert-St Louis
Aug 12
STL3:30 pmLambert-St Louis
13h 20m
1 stop
OTP12:50 pmBucharest Otopeni Intl
$1,099
Lufthansa
May 29
OTP6:05 amBucharest Otopeni Intl
15h 20m
1 stop
STL1:25 pmLambert-St Louis
Jun 2
STL1:13 pmLambert-St Louis
15h 47m
2 stops
OTP1:00 pmBucharest Otopeni Intl
$1,115

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 May 17, 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 - STL

OTPSTL

Bucharest Otopeni Intl

Wed 7/29

6:05 am-11:44 pm

2 stops25h 39m

Lambert-St Louis

Wed 8/12

12:59 pm-12:00 pm

2 stops15h 01m

$865

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Wed 7/29

6:05 am-11:44 pm

2 stops25h 39m

Lambert-St Louis

Wed 8/12

3:30 pm-12:50 pm

1 stop13h 20m

$875

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Fri 5/29

7:05 am-5:16 pm

2 stops18h 11m

Lambert-St Louis

Tue 6/2

1:59 pm-3:50 pm

2 stops17h 51m

$886

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Sat 5/30

7:05 am-11:21 pm

2 stops24h 16m

Lambert-St Louis

Wed 6/3

1:59 pm-5:20 pm

2 stops19h 21m

$888

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Fri 5/29

7:05 am-9:09 pm

2 stops22h 04m

Lambert-St Louis

Tue 6/2

5:45 pm-12:45 pm

2 stops35h 00m

$908
Quickest round-trip

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Wed 7/29

6:05 am-1:25 pm

1 stop15h 20m

Lambert-St Louis

Wed 8/12

3:30 pm-12:50 pm

1 stop13h 20m

$1,099

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Mon 6/1

6:05 am-1:25 pm

1 stop15h 20m

Lambert-St Louis

Fri 6/5

5:29 pm-11:40 pm

2 stops22h 11m

$1,104

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Mon 6/1

6:05 am-11:29 pm

2 stops25h 24m

Lambert-St Louis

Fri 6/5

5:29 pm-11:40 pm

2 stops22h 11m

$1,110

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Fri 5/29

6:05 am-1:25 pm

1 stop15h 20m

Lambert-St Louis

Tue 6/2

1:13 pm-1:00 pm

2 stops15h 47m

$1,115

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Fri 5/29

5:35 am-8:09 pm

3 stops22h 34m

Lambert-St Louis

Tue 6/2

3:30 pm-11:15 pm

2 stops23h 45m

$1,145

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

What is the cheapest airline that flies from Bucharest Otopeni Intl to Lambert-St Louis?

British Airways is the most popular carrier operating from Bucharest Otopeni Intl to Lambert-St Louis

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

22h 04m

Direct flights

None
The fastest flight from Bucharest Otopeni Intl Airport to St. Louis takes 22h 04m
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.
Search flight deals

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 22h 04m.

  • 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
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

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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