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Cheap flights from St. Louis to Bucharest from $467

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 9/27. 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

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Find the cheapest flights from St. Louis to Bucharest

Cheap round-trip flights

Air Canada Logo
1:30 pm - 3:20 pmSTL-OTP
41h 50m2 stops
Air Canada Logo
6:00 am - 7:57 pmOTP-STL
21h 57m2 stops
$670Air Canada
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Sun, Sep 7 - Tue, Sep 23
Logo
1:30 pm - 4:50 pmSTL-OTP
19h 20m2 stops
Logo
6:40 pm - 1:30 pmOTP-STL
26h 50m1 stop
$699
Find Deal
Sun, Sep 7 - Tue, Sep 23
Lufthansa Logo
7:04 pm - 1:00 amSTL-OTP
21h 56m2 stops
Lufthansa Logo
6:00 am - 1:30 pmOTP-STL
15h 30m1 stop
$749Lufthansa
Find Deal
Wed, Sep 10 - Sun, Sep 21
Lufthansa Logo
7:04 pm - 6:35 pmSTL-OTP
15h 31m2 stops
Lufthansa Logo
6:00 am - 3:44 pmOTP-STL
17h 44m2 stops
$772Lufthansa
Find Deal
Wed, Sep 10 - Sun, Sep 21
Lufthansa Logo
3:30 pm - 5:55 pmSTL-OTP
18h 25m1 stop
Lufthansa Logo
6:40 pm - 1:30 pmOTP-STL
26h 50m1 stop
$781Lufthansa
Find Deal
Sun, Sep 7 - Tue, Sep 23
Logo
4:05 pm - 1:15 pmSTL-OTP
37h 10m2 stops
Logo
6:40 pm - 7:13 pmOTP-STL
32h 33m2 stops
$786
Find Deal
Sat, Sep 13 - Sat, Sep 20
Lufthansa Logo
3:20 pm - 4:50 pmSTL-OTP
17h 30m2 stops
Lufthansa Logo
6:00 am - 3:44 pmOTP-STL
17h 44m2 stops
$827Lufthansa
Find Deal
Mon, Sep 1 - Sun, Sep 7
United Airlines Logo
3:20 pm - 12:25 pmSTL-OTP
37h 05m2 stops
United Airlines Logo
6:00 am - 3:44 pmOTP-STL
17h 44m2 stops
$846United Airlines
Find Deal
Sun, Aug 31 - Sun, Sep 7
Delta Logo
3:36 pm - 1:00 pmSTL-OTP
37h 24m2 stops
Delta Logo
6:30 am - 11:24 pmOTP-STL
24h 54m2 stops
$875Delta
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Tue, Sep 2 - Sun, Sep 7
British Airways Logo
5:32 pm - 12:45 amSTL-OTP
23h 13m2 stops
British Airways Logo
8:05 pm - 3:25 pmOTP-STL
27h 20m2 stops
$1,132British Airways
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Sun, Aug 31 - Sat, Sep 6

Lufthansa flights from St. Louis to Bucharest

Our best Lufthansa deals on St. Louis to Bucharest flight tickets
Lufthansa
Sep 10
STL7:04 pmLambert-St Louis
21h 56m
2 stops
OTP1:00 amBucharest Otopeni Intl
Sep 21
OTP6:00 amBucharest Otopeni Intl
15h 30m
1 stop
STL1:30 pmLambert-St Louis
$749
Find similar
Lufthansa
Sep 10
STL7:04 pmLambert-St Louis
15h 31m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Sep 21
OTP6:00 amBucharest Otopeni Intl
17h 44m
2 stops
STL3:44 pmLambert-St Louis
$772
Find similar
Lufthansa
Sep 7
STL3:30 pmLambert-St Louis
18h 25m
1 stop
OTP5:55 pmBucharest Otopeni Intl
Sep 23
OTP6:40 pmBucharest Otopeni Intl
26h 50m
1 stop
STL1:30 pmLambert-St Louis
$781
Find similar

Air Canada flights from St. Louis to Bucharest

Our best Air Canada deals on St. Louis to Bucharest flight tickets
Air Canada
Sep 7
STL1:30 pmLambert-St Louis
41h 50m
2 stops
OTP3:20 pmBucharest Otopeni Intl
Sep 23
OTP6:00 amBucharest Otopeni Intl
21h 57m
2 stops
STL7:57 pmLambert-St Louis
$670
Find similar
Air Canada
Aug 13
STL1:30 pmLambert-St Louis
21h 05m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Aug 16
OTP6:30 amBucharest Otopeni Intl
21h 15m
2 stops
STL7:45 pmLambert-St Louis
$1,360
Find similar
Air Canada
Sep 1
STL1:30 pmLambert-St Louis
15h 35m
2 stops
OTP1:05 pmBucharest Otopeni Intl
Sep 5
OTP6:00 amBucharest Otopeni Intl
21h 57m
2 stops
STL7:57 pmLambert-St Louis
$1,424
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Bucharest 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 July 31, 2025.
Use the filters below to find and compare flights from St. Louis to Bucharest that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/7

1:30 pm-3:20 pm

2 stops41h 50m

Bucharest Otopeni Intl

Tue 9/23

6:00 am-7:57 pm

2 stops21h 57m

$670

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/7

1:30 pm-4:50 pm

2 stops19h 20m

Bucharest Otopeni Intl

Tue 9/23

6:40 pm-1:30 pm

1 stop26h 50m

$699

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/10

7:04 pm-1:00 am

2 stops21h 56m

Bucharest Otopeni Intl

Sun 9/21

6:00 am-1:30 pm

1 stop15h 30m

$749

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 9/10

7:04 pm-6:35 pm

2 stops15h 31m

Bucharest Otopeni Intl

Sun 9/21

6:00 am-3:44 pm

2 stops17h 44m

$772

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 9/7

3:30 pm-5:55 pm

1 stop18h 25m

Bucharest Otopeni Intl

Tue 9/23

6:40 pm-1:30 pm

1 stop26h 50m

$781

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sat 9/13

4:05 pm-1:15 pm

2 stops37h 10m

Bucharest Otopeni Intl

Sat 9/20

6:40 pm-7:13 pm

2 stops32h 33m

$786

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Mon 9/1

3:20 pm-4:50 pm

2 stops17h 30m

Bucharest Otopeni Intl

Sun 9/7

6:00 am-3:44 pm

2 stops17h 44m

$827

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 8/31

3:20 pm-12:25 pm

2 stops37h 05m

Bucharest Otopeni Intl

Sun 9/7

6:00 am-3:44 pm

2 stops17h 44m

$846

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 9/2

3:36 pm-1:00 pm

2 stops37h 24m

Bucharest Otopeni Intl

Sun 9/7

6:30 am-11:24 pm

2 stops24h 54m

$875

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 8/31

5:32 pm-12:45 am

2 stops23h 13m

Bucharest Otopeni Intl

Sat 9/6

8:05 pm-3:25 pm

2 stops27h 20m

$1,132

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to Bucharest

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 day to depart on your flight to Bucharest?

Our data shows that Saturday is the least expensive day to fly to Bucharest. Tickets to fly out on this day can be as low as $813. The most expensive day to fly to Bucharest is Wednesday, with ticket prices averaging around $1,473.

What is the cheapest time of day to depart on your flight to Bucharest?

According to our data, the cheapest time of day to fly to Bucharest is in the morning. momondo users have found flights departing from St. Louis to Bucharest in the morning for as low as $1,059. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Bucharest is in the afternoon when prices are around $1,313.

When to book flights from St. Louis to Bucharest

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

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

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

Best Price Found

$467

Fastest flight time

13h 45m

Direct flights

None

Airports in Bucharest

1 airport
The best one-way flight to Bucharest from St. Louis in the past 72 hours is $467. The best round-trip flight deal from St. Louis to Bucharest found on momondo in the last 72 hours is $670.
The fastest flight from St. Louis to Bucharest takes 13h 45m
There are no direct flights from St. Louis to Bucharest. Popular non-direct route for this connection is Lambert-St Louis Airport - Bucharest Otopeni Intl Airport.
There is 1 airport near Bucharest: Bucharest Otopeni Intl (OTP)
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  • How far is Lambert-St Louis to Bucharest by plane?

    Lambert-St Louis and Bucharest are 5458.3 mi apart from one another. Flights usually cover this in 13h 45m, depending on flying conditions and air traffic around both airports.

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

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

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Bucharest?

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

    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 Lambert-St Louis Airport to Bucharest.

  • What documentation or ID do you need to fly to Bucharest?

    The travel and health documents required for your trip to Bucharest can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Bucharest. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Bucharest?

Best airlines flying from St. Louis to Bucharest

Compare and see reviews for airlines that fly from St. Louis to Bucharest with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $759Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
LufthansaPriceFrom $817Free CancellationRating
6.8
7,275 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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Why should I use momondo to find a flight deal from St. Louis to Bucharest?

It is quick and easy to find St. Louis to Bucharest flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Bucharest that suits you.

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

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

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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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Find better results for your trip to Romania

Fly into one of these airports located in Bucharest

Airports listed have a maximum distance of 9.6 mi from Bucharest
Bucharest Otopeni Intl Airport