Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Bucharest to St. Louis from $594

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 to St. Louis departing on 8/26. 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 to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:15 am - 11:58 pm
OTP
-
STL
25h 43m
2 stops
United Airlines Logo
7:00 am - 12:00 pm
STL
-
OTP
21h 00m
2 stops
$901United Airlines
Wed, Jun 24 - Thu, Aug 27
United Airlines Logo
6:15 am - 6:13 pm
OTP
-
STL
19h 58m
2 stops
United Airlines Logo
3:30 pm - 1:05 pm
STL
-
OTP
13h 35m
1 stop
$902United Airlines
Wed, Jun 24 - Sun, Aug 30
Air Canada Logo
6:20 am - 12:21 pm
OTP
-
STL
38h 01m
2 stops
Air Canada Logo
12:10 pm - 4:20 pm
STL
-
OTP
20h 10m
2 stops
$904Air Canada
Tue, Jun 23 - Tue, Sep 1
Air Canada Logo
6:20 am - 8:07 pm
OTP
-
STL
21h 47m
2 stops
Air Canada Logo
8:55 am - 12:00 pm
STL
-
OTP
19h 05m
2 stops
$908Air Canada
Tue, Jun 23 - Sat, Aug 29
Air Canada Logo
6:20 am - 12:21 pm
OTP
-
STL
38h 01m
2 stops
Air Canada Logo
8:55 am - 1:00 pm
STL
-
OTP
20h 05m
2 stops
$909Air Canada
Tue, Jun 23 - Thu, Aug 27
United Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
United Airlines Logo
1:00 pm - 12:00 pm
STL
-
OTP
15h 00m
2 stops
$921United Airlines
Tue, Jun 23 - Wed, Aug 26
United Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
United Airlines Logo
3:30 pm - 1:10 pm
STL
-
OTP
13h 40m
1 stop
$922United Airlines
Tue, Jun 23 - Fri, Aug 28
United Airlines Logo
6:05 am - 5:42 pm
OTP
-
STL
19h 37m
2 stops
United Airlines Logo
6:54 pm - 6:35 pm
STL
-
OTP
15h 41m
2 stops
$926United Airlines
Tue, Jun 23 - Mon, Aug 31
Air Canada Logo
1:50 pm - 8:25 pm
OTP
-
STL
38h 35m
2 stops
Air Canada Logo
12:10 pm - 4:30 pm
STL
-
OTP
20h 20m
2 stops
$929Air Canada
Tue, Jun 23 - Sun, Aug 30
Air Canada Logo
6:05 am - 8:25 pm
OTP
-
STL
22h 20m
2 stops
Air Canada Logo
8:55 am - 12:00 pm
STL
-
OTP
19h 05m
2 stops
$933Air Canada
Tue, Jun 23 - Sat, Aug 29

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

United Airlines flights from Bucharest to St. Louis

Our best United Airlines deals on Bucharest to St. Louis flight tickets
United Airlines
Jun 24
OTP6:15 amBucharest Otopeni Intl
25h 43m
2 stops
STL11:58 pmLambert-St Louis
Aug 27
STL7:00 amLambert-St Louis
21h 00m
2 stops
OTP12:00 pmBucharest Otopeni Intl
$901
United Airlines
Jun 24
OTP6:15 amBucharest Otopeni Intl
19h 58m
2 stops
STL6:13 pmLambert-St Louis
Aug 30
STL3:30 pmLambert-St Louis
13h 35m
1 stop
OTP1:05 pmBucharest Otopeni Intl
$902
United Airlines
Jun 16
OTP6:05 amBucharest Otopeni Intl
16h 18m
2 stops
STL2:23 pmLambert-St Louis
Aug 27
STL7:00 amLambert-St Louis
21h 00m
2 stops
OTP12:00 pmBucharest Otopeni Intl
$917

Air Canada flights from Bucharest to St. Louis

Our best Air Canada deals on Bucharest to St. Louis flight tickets
Air Canada
Jun 23
OTP6:20 amBucharest Otopeni Intl
38h 01m
2 stops
STL12:21 pmLambert-St Louis
Sep 1
STL12:10 pmLambert-St Louis
20h 10m
2 stops
OTP4:20 pmBucharest Otopeni Intl
$904
Air Canada
Jun 23
OTP6:20 amBucharest Otopeni Intl
21h 47m
2 stops
STL8:07 pmLambert-St Louis
Aug 29
STL8:55 amLambert-St Louis
19h 05m
2 stops
OTP12:00 pmBucharest Otopeni Intl
$908
Air Canada
Jun 23
OTP6:20 amBucharest Otopeni Intl
38h 01m
2 stops
STL12:21 pmLambert-St Louis
Aug 27
STL8:55 amLambert-St Louis
20h 05m
2 stops
OTP1:00 pmBucharest Otopeni Intl
$909

momondo Fare Finder

 
Customize your flight search to find flights from Bucharest 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 June 13, 2026.
Use the filters below to find and compare flights from Bucharest 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 6/24

6:15 am-11:58 pm

2 stops25h 43m

Lambert-St Louis

Thu 8/27

7:00 am-12:00 pm

2 stops21h 00m

$901

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Wed 6/24

6:15 am-6:13 pm

2 stops19h 58m

Lambert-St Louis

Sun 8/30

3:30 pm-1:05 pm

1 stop13h 35m

$902

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

6:20 am-12:21 pm

2 stops38h 01m

Lambert-St Louis

Tue 9/1

12:10 pm-4:20 pm

2 stops20h 10m

$904

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

6:20 am-8:07 pm

2 stops21h 47m

Lambert-St Louis

Sat 8/29

8:55 am-12:00 pm

2 stops19h 05m

$908

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

6:20 am-12:21 pm

2 stops38h 01m

Lambert-St Louis

Thu 8/27

8:55 am-1:00 pm

2 stops20h 05m

$909

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

6:05 am-1:25 pm

1 stop15h 20m

Lambert-St Louis

Wed 8/26

1:00 pm-12:00 pm

2 stops15h 00m

$921
Quickest round-trip

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

6:05 am-1:25 pm

1 stop15h 20m

Lambert-St Louis

Fri 8/28

3:30 pm-1:10 pm

1 stop13h 40m

$922

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

6:05 am-5:42 pm

2 stops19h 37m

Lambert-St Louis

Mon 8/31

6:54 pm-6:35 pm

2 stops15h 41m

$926

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

1:50 pm-8:25 pm

2 stops38h 35m

Lambert-St Louis

Sun 8/30

12:10 pm-4:30 pm

2 stops20h 20m

$929

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Tue 6/23

6:05 am-8:25 pm

2 stops22h 20m

Lambert-St Louis

Sat 8/29

8:55 am-12:00 pm

2 stops19h 05m

$933

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

See travel insights to St. Louis from

How to get the cheapest flight ticket from Bucharest 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 to Lambert-St Louis?

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

When to book flights from Bucharest to St. Louis

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

Cheap Bucharest to St. Louis (BUH to STL) flight deals and tips

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

Fastest flight time

21h 34m

Direct flights

None
The fastest flight from Bucharest to St. Louis takes 21h 34m
There are no direct flights from Bucharest to St. Louis. There are no popular flight routes from Bucharest to St. Louis.
Search flight deals

Frequently asked questions about flying from Bucharest to St. Louis

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

    Lambert-St Louis is 5458.3 mi away from Bucharest. Typically, this will take 21h 34m by plane in normal conditions.

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

    Prices for flights from Bucharest to Lambert-St Louis Airport refresh daily.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bucharest to Lambert-St Louis Airport.

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

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable 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
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Fenton
Clayton
Farmington
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Bucharest to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Bucharest to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Bucharest to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 7/13
Mon 7/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States