$537 Cheap Flights from Bucharest (OTP) to Denver (DEN)

View $537 flight on Fri, Jun 5, 2026Opens in a new window

Popular airlines from Henri Coanda Intl. Airport (OTP) to Denver Intl. Airport (DEN)

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Cheap Flights from Bucharest to Denver (OTP-DEN)

Prices were available within the past 7 days and start at $537 for one-way flights and $835 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Serbia
Sun, Jun 28 - Tue, Sep 29
OTP
Bucharest
DEN
Denver
$835 Roundtrip, found 6 days ago
$835
Roundtrip
found 6 days ago
Select Air Serbia flight, departing Sun, Jun 28 from Bucharest to Denver, returning Tue, Sep 29, priced at $835 found 6 days ago
LOT-Polish Airlines
Wed, May 6 - Wed, Jun 3
OTP
Bucharest
DEN
Denver
$852 Roundtrip, found 6 days ago
$852
Roundtrip
found 6 days ago
Select LOT-Polish Airlines flight, departing Wed, May 6 from Bucharest to Denver, returning Wed, Jun 3, priced at $852 found 6 days ago
Air Serbia
Sun, Jun 28 - Tue, Sep 29
OTP
Bucharest
DEN
Denver
$854 Roundtrip, found 6 days ago
$854
Roundtrip
found 6 days ago
Select Air Serbia flight, departing Sun, Jun 28 from Bucharest to Denver, returning Tue, Sep 29, priced at $854 found 6 days ago
Air Serbia
Fri, Jul 3 - Sat, Jul 11
OTP
Bucharest
DEN
Denver
$902 Roundtrip, found 4 days ago
$902
Roundtrip
found 4 days ago
Select Air Serbia flight, departing Fri, Jul 3 from Bucharest to Denver, returning Sat, Jul 11, priced at $902 found 4 days ago
Lufthansa
Tue, Apr 7 - Wed, May 27
OTP
Bucharest
DEN
Denver
$909 Roundtrip, found 5 days ago
$909
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Tue, Apr 7 from Bucharest to Denver, returning Wed, May 27, priced at $909 found 5 days ago
Swiss International Air Lines
Wed, May 6 - Wed, Jun 3
OTP
Bucharest
DEN
Denver
$909 Roundtrip, found 6 days ago
$909
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Wed, May 6 from Bucharest to Denver, returning Wed, Jun 3, priced at $909 found 6 days ago
LOT-Polish Airlines
Sat, Apr 25 - Wed, Jun 3
OTP
Bucharest
DEN
Denver
$914 Roundtrip, found 5 days ago
$914
Roundtrip
found 5 days ago
Select LOT-Polish Airlines flight, departing Sat, Apr 25 from Bucharest to Denver, returning Wed, Jun 3, priced at $914 found 5 days ago
LOT-Polish Airlines
Wed, May 6 - Wed, Jun 3
OTP
Bucharest
DEN
Denver
$916 Roundtrip, found 6 days ago
$916
Roundtrip
found 6 days ago
Select LOT-Polish Airlines flight, departing Wed, May 6 from Bucharest to Denver, returning Wed, Jun 3, priced at $916 found 6 days ago
British Airways
Sun, May 10 - Fri, Jun 26
OTP
Bucharest
DEN
Denver
$918 Roundtrip, found 1 day ago
$918
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, May 10 from Bucharest to Denver, returning Fri, Jun 26, priced at $918 found 1 day ago
Lufthansa
Sat, Apr 18 - Sat, Apr 25
OTP
Bucharest
DEN
Denver
$929 Roundtrip, found 5 days ago
$929
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Sat, Apr 18 from Bucharest to Denver, returning Sat, Apr 25, priced at $929 found 5 days ago

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Frequently asked questions

How much does a flight from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) cost?
You can find cheap one-way flights from $537 and cheap return flights from $835 Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) with Expedia. One-way flights usually range from $552 to $1039, and return flights typically cost between $956 and $3648. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
The cheapest month to fly from OTP to DEN is June when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
Enter OTP to DEN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
Air Serbia is one of the cheapest airlines offering connecting flights from Henri Coanda Intl. (OTP) to Denver Intl. (DEN) with a layover in Nikola Tesla, starting from around $1,048 for a round-trip ticket. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
To find a cheap flight from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
The earliest flight from Bucharest (OTP-Henri Coanda Intl.) to Denver (DEN-Denver Intl.) typically departs at around 2:20 AM. This seasonal service is available in July and October, allowing you to start your journey early and maximize your time in Denver. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
The most popular departure times for flights from Bucharest (OTP) to Denver, CO (DEN) are in the early morning, from 6am to 9am. About 39% of passengers prefer this time window. Many major carriers, including KLM and British Airways, operate flights during this time. This timing works well because it allows you to arrive in Denver with plenty of time to explore the city.
How long does it take to fly from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
Flights from OTP to DEN with one stop typically take around 16 hours 30 minutes, covering approximately 5,851 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
You can fly business class between OTP and DEN. Airlines that offer business class service on this route include:

  • Lufthansa
  • Turkish Airlines
  • British Airways
  • Tarom
  • Air Baltic
  • Swiss International Air Lines
  • SAS
  • Austrian Airlines
  • Qatar Airways
  • KLM

How do I earn miles on a Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) flight with Expedia?
It's easy to earn miles on a Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Denver from Henri Coanda Intl. (OTP)?
If you're planning to travel to Denver from Henri Coanda Intl. (OTP), you can fly into Denver Intl. (DEN) Some flights may connect through major hubs like Frankfurt Intl. (FRA), Franz Josef Strauss Intl. (MUC), Schiphol (AMS) before reaching Denver. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) at the last minute?
Typically, booking a last minute flight from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) flight and hotel package?
Securing a Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) Denver Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.)?
If you booked your Bucharest (OTP-Henri Coanda Intl.) to Denver, CO (DEN-Denver Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Henri Coanda Intl.
Destination airport
Denver Intl.
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$835
Distance
5850 mi

Book with confidence

Bucharest to Denver Flights

The cheapest times to fly from Bucharest to Denver

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Bucharest to Denver are during the month of June. You can find some of the cheapest flights from Bucharest to Denver with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Bucharest to Denver

Sunday is one of the best days to book for cheap flights from Bucharest to Denver: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Bucharest to Denver

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Bucharest to Denver in 2026. You can also book with separate airlines for your outbound and return journeys, from $537 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Bucharest to Denver flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Bucharest to Denver airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Bucharest to Denver Flights

*Flight schedules are subject to change.

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*Available to One Key members.