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Cheap flights from Bucharest Otopeni Intl Airport to St. Louis from $480

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 2/23. 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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0 bags

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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
5:50 am - 9:05 pm
OTP
-
STL
23h 15m
2 stops
United Airlines Logo
6:55 pm - 11:55 pm
STL
-
OTP
21h 00m
2 stops
$1,004United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
5:50 am - 9:40 pm
OTP
-
STL
23h 50m
2 stops
United Airlines Logo
9:55 am - 2:05 pm
STL
-
OTP
20h 10m
2 stops
$1,006United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
5:50 am - 10:14 pm
OTP
-
STL
24h 24m
3 stops
United Airlines Logo
11:39 am - 2:05 pm
STL
-
OTP
18h 26m
2 stops
$1,111United Airlines
Thu, Feb 19 - Mon, Feb 23

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
Feb 19
OTP5:50 amBucharest Otopeni Intl
23h 15m
2 stops
STL9:05 pmLambert-St Louis
Feb 23
STL6:55 pmLambert-St Louis
21h 00m
2 stops
OTP11:55 pmBucharest Otopeni Intl
$1,004
United Airlines
Feb 19
OTP5:50 amBucharest Otopeni Intl
24h 24m
3 stops
STL10:14 pmLambert-St Louis
Feb 23
STL8:17 amLambert-St Louis
21h 48m
2 stops
OTP2:05 pmBucharest Otopeni Intl
$1,006
United Airlines
Feb 19
OTP5:50 amBucharest Otopeni Intl
24h 24m
3 stops
STL10:14 pmLambert-St Louis
Feb 23
STL11:39 amLambert-St Louis
18h 26m
2 stops
OTP2:05 pmBucharest Otopeni Intl
$1,111

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 February 9, 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

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Thu 2/19

5:50 am-9:05 pm

2 stops23h 15m

Lambert-St Louis

Mon 2/23

6:55 pm-11:55 pm

2 stops21h 00m

$1,004

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Thu 2/19

5:50 am-9:40 pm

2 stops23h 50m

Lambert-St Louis

Mon 2/23

9:55 am-2:05 pm

2 stops20h 10m

$1,006

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Thu 2/19

5:50 am-10:14 pm

3 stops24h 24m

Lambert-St Louis

Mon 2/23

11:39 am-2:05 pm

2 stops18h 26m

$1,111

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Mon 2/23

5:55 am-6:51 am

3 stops56h 56m

$480

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Mon 2/23

5:55 am-11:59 pm

2 stops26h 04m

$556

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Sun 2/22

12:35 pm-11:59 pm

3 stops43h 24m

$585

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Sun 2/22

11:45 am-11:59 pm

2 stops44h 14m

$628

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

23h 15m

Direct flights

None
The fastest flight from Bucharest Otopeni Intl Airport to St. Louis takes 23h 15m
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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  • 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 23h 15m.

  • 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.

  • How do I get Price Alerts for flights from Bucharest Otopeni Intl Airport to St. Louis?

    Confirm your travel details to search for the latest offers for flights from Bucharest Otopeni Intl Airport to St. Louis. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Bucharest Otopeni Intl Airport to St. Louis with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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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