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Cheap flights from St. Louis to Bucharest from $650

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bucharest departing on 5/1. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Bucharest

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
2:40 pm - 3:20 pm
STL
-
OTP
40h 40m
2 stops
Air Canada Logo
6:05 am - 6:41 pm
OTP
-
STL
20h 36m
2 stops
$979Air Canada
토, 10월 3 - 토, 10월 10
British Airways Logo
8:07 pm - 12:50 am
STL
-
OTP
44h 43m
2 stops
British Airways Logo
8:00 pm - 7:30 pm
OTP
-
STL
31h 30m
1 stop
$1,050British Airways
토, 10월 3 - 토, 10월 10
United Airlines Logo
5:10 am - 6:35 pm
STL
-
OTP
29h 25m
2 stops
United Airlines Logo
6:15 am - 12:06 pm
OTP
-
STL
37h 51m
2 stops
$1,162United Airlines
수, 5월 27 - 토, 6월 6
Air Canada Logo
2:15 pm - 3:20 pm
STL
-
OTP
17h 05m
2 stops
Air Canada Logo
6:05 am - 8:25 pm
OTP
-
STL
22h 20m
2 stops
$1,172Air Canada
목, 6월 4 - 목, 6월 11
Air Canada Logo
2:15 pm - 6:35 pm
STL
-
OTP
20h 20m
2 stops
Air Canada Logo
6:15 am - 12:06 pm
OTP
-
STL
37h 51m
2 stops
$1,176Air Canada
금, 6월 5 - 금, 6월 12
Multiple Airlines Logo
7:05 am - 10:55 pm
STL
-
OTP
31h 50m
3 stops
Multiple Airlines Logo
7:40 am - 8:25 pm
OTP
-
STL
44h 45m
3 stops
$1,220Multiple Airlines
수, 5월 27 - 토, 6월 6
Delta Logo
11:25 am - 1:00 pm
STL
-
OTP
17h 35m
2 stops
Delta Logo
6:00 am - 11:21 pm
OTP
-
STL
25h 21m
2 stops
$1,224Delta
수, 5월 20 - 토, 5월 30
Multiple Airlines Logo
2:15 pm - 6:35 pm
STL
-
OTP
20h 20m
2 stops
Multiple Airlines Logo
6:05 am - 1:25 pm
OTP
-
STL
15h 20m
1 stop
$1,264Multiple Airlines
금, 6월 5 - 금, 6월 12
Multiple Airlines Logo
2:15 pm - 3:20 pm
STL
-
OTP
17h 05m
2 stops
Multiple Airlines Logo
1:45 pm - 1:25 pm
OTP
-
STL
31h 40m
1 stop
$1,283Multiple Airlines
목, 6월 4 - 목, 6월 11
British Airways Logo
1:45 pm - 2:35 pm
STL
-
OTP
16h 50m
2 stops
British Airways Logo
8:15 am - 8:29 pm
OTP
-
STL
20h 14m
2 stops
$1,368British Airways
수, 7월 1 - 금, 7월 31

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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
Apr 24
STL3:30 pmLambert-St Louis
13h 40m
1 stop
OTP1:10 pmBucharest Otopeni Intl
May 31
OTP6:15 amBucharest Otopeni Intl
17h 31m
2 stops
STL3:46 pmLambert-St Louis
$1,235
Lufthansa
Apr 24
STL3:30 pmLambert-St Louis
13h 40m
1 stop
OTP1:10 pmBucharest Otopeni Intl
May 31
OTP5:35 pmBucharest Otopeni Intl
27h 50m
1 stop
STL1:25 pmLambert-St Louis
$1,339
Lufthansa
Apr 24
STL3:30 pmLambert-St Louis
13h 40m
1 stop
OTP1:10 pmBucharest Otopeni Intl
May 31
OTP5:35 pmBucharest Otopeni Intl
27h 50m
1 stop
STL1:25 pmLambert-St Louis
$1,368

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

Our best British Airways deals on St. Louis to Bucharest Otopeni Intl Airport flight tickets
British Airways
Apr 26
STL9:40 pmLambert-St Louis
19h 10m
1 stop
OTP12:50 amBucharest Otopeni Intl
May 12
OTP8:15 amBucharest Otopeni Intl
19h 15m
1 stop
STL7:30 pmLambert-St Louis
$982
British Airways
Oct 3
STL8:07 pmLambert-St Louis
44h 43m
2 stops
OTP12:50 amBucharest Otopeni Intl
Oct 10
OTP8:00 pmBucharest Otopeni Intl
31h 30m
1 stop
STL7:30 pmLambert-St Louis
$1,050
British Airways
Jul 1
STL1:45 pmLambert-St Louis
16h 50m
2 stops
OTP2:35 pmBucharest Otopeni Intl
Jul 31
OTP8:15 amBucharest Otopeni Intl
20h 14m
2 stops
STL8:29 pmLambert-St Louis
$1,368

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 4월 23, 2026.
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

Cheapest round-trip

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

토 10/3

2:40 pm-3:20 pm

2 stops40h 40m

Bucharest Otopeni Intl

토 10/10

6:05 am-6:41 pm

2 stops20h 36m

$979

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

토 10/3

8:07 pm-12:50 am

2 stops44h 43m

Bucharest Otopeni Intl

토 10/10

8:00 pm-7:30 pm

1 stop31h 30m

$1,050

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

수 5/27

5:10 am-6:35 pm

2 stops29h 25m

Bucharest Otopeni Intl

토 6/6

6:15 am-12:06 pm

2 stops37h 51m

$1,162

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

목 6/4

2:15 pm-3:20 pm

2 stops17h 05m

Bucharest Otopeni Intl

목 6/11

6:05 am-8:25 pm

2 stops22h 20m

$1,172

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

금 6/5

2:15 pm-6:35 pm

2 stops20h 20m

Bucharest Otopeni Intl

금 6/12

6:15 am-12:06 pm

2 stops37h 51m

$1,176

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

수 5/27

7:05 am-10:55 pm

3 stops31h 50m

Bucharest Otopeni Intl

토 6/6

7:40 am-8:25 pm

3 stops44h 45m

$1,220

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

수 5/20

11:25 am-1:00 pm

2 stops17h 35m

Bucharest Otopeni Intl

토 5/30

6:00 am-11:21 pm

2 stops25h 21m

$1,224
Quickest round-trip

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

금 6/5

2:15 pm-6:35 pm

2 stops20h 20m

Bucharest Otopeni Intl

금 6/12

6:05 am-1:25 pm

1 stop15h 20m

$1,264

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

목 6/4

2:15 pm-3:20 pm

2 stops17h 05m

Bucharest Otopeni Intl

목 6/11

1:45 pm-1:25 pm

1 stop31h 40m

$1,283

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

수 7/1

1:45 pm-2:35 pm

2 stops16h 50m

Bucharest Otopeni Intl

금 7/31

8:15 am-8:29 pm

2 stops20h 14m

$1,368

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 St. Louis to Bucharest Otopeni Intl Airport

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Can stopping save me money on St. Louis to Bucharest Otopeni Intl Airport flights?

You could potentially save up to 42% on your flight if you consider stops on a St. Louis to Bucharest Otopeni Intl Airport flight.

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

Fastest flight time

16h 50m

Direct flights

None
The fastest flight from St. Louis to Bucharest Otopeni Intl Airport takes 16h 50m
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

Frequently asked questions about flying from St. Louis to Bucharest Otopeni Intl Airport

  • 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 16h 50m.

  • 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
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,635 reviews
Search United Airlines flights
LufthansaPriceFrom $800Free CancellationRating
6.8
7,940 reviews
Search Lufthansa 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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Can I find flights from St. Louis to Bucharest with flexible booking policies on momondo?

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

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momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Bucharest.

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