Cheap Flights to Roundup, MT

Popular airlines to Roundup

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Alternative airports near Roundup

Prices were available within the past 7 days. Prices and availability are subject to change.

What you need to know for your flight to Roundup

Flights to Roundup at a glance

Traveling to Roundup is easy with a variety of airlines offering numerous flight options. Explore your choices for journey times and select the flight that best aligns with your plans to discover the city's renowned attractions and neighborhoods. Look for cheap flights to Roundup to make your trip even more budget-friendly.

  • Major airport near Roundup: Logan International Airport (BIL)
  • Flights per week: 1,250+ flights arriving at Roundup airport
  • Number of airlines that fly to Roundup: around 10+ carriers

Popular airport near Roundup

Roundup is a charming city that caters to families and outdoor enthusiasts, making it an ideal destination for entertaining vacations. Visitors are drawn to its eco-friendly atmosphere, picturesque scenery, and vibrant community. Travelers can conveniently access Roundup via its closest airport, ensuring easy connections to this welcoming locale.

  • Logan International Airport (BIL): Situated in Yellowstone County, Montana, approximately 45 miles from Roundup, this airport offers both domestic and international flights, linking travelers to over 145 domestic cities and more than 10 international destinations. Passengers have the option to enhance their travel experience with upgrades to first class, business class, or premium economy seating, depending on the airline and route. Major airlines operating from this airport include United, Delta, and American Airlines.

Top routes to Roundup

  • Seattle (SEA) to Roundup (BIL), with one-way airfare from around $90
  • Portland (PWM/PDX) to Roundup (BIL), with one-way flight options from around $90
  • Las Vegas (LAS) to Roundup (BIL), with one-way fares starting at around $120
  • Phoenix (PHX) to Roundup (BIL), with one-way fares starting at around $100
  • Denver (DEN) to Roundup (BIL), with one-way tickets available from around $95

Cheapest routes to Roundup

  • Sidney (SDY) to Roundup (BIL), with affordable one-way prices from around $50
  • Havre (HVR) to Roundup (BIL), with affordable one-way prices from around $50
  • Wolf Point (OLF) to Roundup (BIL), with low one-way fares from around $50
  • Seattle (SEA) to Roundup (BIL), with affordable one-way prices from around $90
  • Portland (PWM/PDX) to Roundup (BIL), with cheap one-way fares from around $90

*Flight times and fares vary by season and availability and are based on one-way routes

Top airlines with flights to Roundup

  • United: Operating flights to Logan International Airport (BIL), United is responsible for about 43% of arrivals in Roundup. The typical one-way fare hovers around $290, with premium service options that may include first class based on the route.
  • Delta: Serving Logan International Airport (BIL), Delta accounts for roughly 24% of the arrivals to Roundup. The average fare for a one-way ticket is around $270, with premium cabin possibilities that may encompass premium economy and first class depending on the route.
  • American Airlines: With flights to Logan International Airport (BIL), American Airlines represents about 18% of the arrivals to Roundup. One-way fares are approximately $300, and premium cabin choices may include first class depending on the specific route.
  • Alaska Airlines: Providing service to Logan International Airport (BIL), Alaska Airlines is responsible for nearly 13% of arrivals to Roundup. The average fare for a one-way trip is about $260, featuring premium service options that may include business class and first class based on the route.
  • Hahn Air: Operating flights to Logan International Airport (BIL), Hahn Air accounts for around 1% of arrivals to Roundup. Passengers can expect an average one-way fare of about $50.

Best time to fly to Roundup

The most popular months for travelers to fly to Roundup are March, April, and July, when peak temperatures in Roundup can reach up to 74.8°F in July. If you prefer quieter travel, consider October, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 47.5°F. For better deals, September usually offers the lowest average one-way fare around $250, roughly 10% cheaper than the yearly average. Looking for additional cheaper months to fly? August, October, and May offer average one-way fares roughly ranging from $258 to $273, making them good options for flexible travelers.

calendar iconMonthtemperature iconTemperaturerain iconPrecipitationmostly cloudy iconCloudinesscrowd level iconDemandprice iconAverage one-way Fare
January25.5°F (-3.6°C)No Rain (Dry)Mostly SunnyAverage$287
February24.1°F (-4.4°C)No Rain (Dry)Mostly SunnyAverage$277
March36.1°F (2.3°C)No Rain (Dry)Mostly SunnyModerately High$307
April44.2°F (6.8°C)Light RainMostly SunnyModerately High$284
May55.2°F (12.9°C)Light RainMostly SunnyAverage$273
June65.3°F (18.5°C)Light RainMostly SunnyAverage$290
July74.8°F (23.8°C)No Rain (Dry)SunnyModerately High$274
August73.2°F (22.9°C)No Rain (Dry)SunnyAverage$258
September63.3°F (17.4°C)No Rain (Dry)SunnyAverage$250
October47.5°F (8.6°C)No Rain (Dry)Mostly SunnyModerately Low$266
November35.4°F (1.9°C)No Rain (Dry)Mostly SunnyModerately Low$275
December25.3°F (-3.7°C)No Rain (Dry)Mostly SunnyModerately Low$303

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

How to save money on a flight to Roundup

Getting some of the best deals on flights to Roundup is all about timing and flexibility. Here are some key tips to help you save:

  1. Compare flight options—use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  2. Set up price alerts—as an Expedia member you can use Price Tracking to receive notifications when flight prices change.
  3. Bundle and save—book a flight and unlock a hotel deal on Expedia*, or explore our Roundup hotel and flight deals.
  4. Think about luggage-nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your baggage allowance before confirming your booking to avoid excess baggage fees at the airport.
  5. Earn miles—you can earn airline miles when you book your Roundup flight with Expedia. Just select your frequent flyer program and enter your program number when confirming your booking.

*For members. Select hotels.

Arriving in Roundup

Roundup welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach Roundup efficiently:

  • Public transportation: From Logan International Airport, Billings Seaport, a seaport, is located about 0.1 miles from the airport, making it easily accessible for travelers.
  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Roundup, with private rides that can be arranged in advance.
  • Car rental: Renting a car in Roundup is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in Roundup on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.

Where to stay in and around Roundup

  • Klein: Nestled in the area of Roundup, Klein is a charming village perfect for families seeking outdoor adventure and eco-friendly experiences. Enjoy the scenic landscape while exploring activities such as golfing and visiting local parks. Key highlights include Roundup City Park, an ideal spot for family picnics and outdoor fun, and the Musselshell Valley Historical Museum, which offers a glimpse into the region’s rich history and culture. Klein is an excellent destination for those looking to connect with nature and enjoy a relaxed atmosphere.
  • Lavina: Located 22 miles drive away from Roundup, Lavina is a picturesque city known for its stunning scenery and romantic ambiance. Travelers will be enchanted by the tranquil lakes and beautiful landscapes that surround the area. Highlights include the serene Roundup City Park, perfect for outdoor activities, and the Musselshell Valley Historical Museum, which provides a cultural experience for visitors. Lavina is best enjoyed during the warmer months, making it a lovely getaway for couples and nature enthusiasts alike.
  • Camp Three: Found in the area of Roundup, Camp Three is a quaint village offering a blend of outdoor family activities and city conveniences. Visitors can engage in various recreational pursuits, including golfing and exploring nearby parks. Key attractions include Roundup City Park, a family-friendly urban space for leisure and enjoyment, and the Musselshell Valley Historical Museum, a fascinating stop for history buffs. Camp Three is a great choice for travelers looking for a relaxed yet engaging environment.

Tips for short-haul flights to Roundup

For quick getaways, efficiency is key. Here is how to make your short-haul journey smoother:

  • Pack light and skip checked bags—when flying with budget airlines, traveling with just a carry-on is often more economical. Optimize your packing by using mini toiletries, wearing your bulkiest clothing, and planning your outfits strategically. This approach also helps you bypass the wait at baggage claim upon arrival.
  • Bring your own entertainment—many short-haul flights may lack in-flight entertainment options. To keep yourself entertained, download TV shows, movies, music, or podcasts ahead of time and consider bringing a book. Remember to fully charge your devices before boarding.
  • Arrive at the airport in plenty of time—even for short or domestic flights, it’s advisable to arrive at least 1.5 to 2 hours prior to departure, taking into account traffic and security lines.
  • Bring your own snacks and water—pack some snacks and a refillable water bottle to stay hydrated and save money while at the airport.

Tips for long-haul flights to Roundup

Flying long-haul sometimes requires extra planning to ensure a comfortable journey:

  • Select your seat in advance—for longer flights, choosing your seat is essential for comfort. Full-service airlines often allow free seat selection once online check-in opens, typically 24–48 hours before your flight. Some airlines may even provide seat selection earlier.
  • Arrive at the airport in plenty of time—make sure to arrive at the airport at least 3 hours prior to departure for international flights to accommodate check-in, security, and immigration processes.
  • Relax at the airport—if you have some extra time, take the opportunity to explore the shops, grab a coffee, or unwind at the gate or in a departure lounge if you have access. Airport Wi-Fi is generally free and available.
  • Adjust to the new time zone mid-flight—begin to sync your body clock by changing your watch and adjusting your sleep schedule to align with your destination's time zone. Try to sleep or stay awake during the flight according to the local time at your arrival destination to help minimize jet lag.

Frequently asked questions

What month is the cheapest to fly to Roundup?
is the cheapest month to travel to Roundup. Demand is lower then, so you're likely to snag a great deal. Booking your trip outside of public and school holidays could also help you save.
Which US cities have the cheapest flights to Roundup?
Land cheap flights to Roundup from Sidney, Denver and Salt Lake City. These cities generally offer the best fares to this exciting destination. But keep in mind that stopovers, seasonality and demand will also influence rates, so remain flexible and book when prices are right.
Which US cities fly direct to Roundup?
Pick from 12 US destinations that have direct flights to Roundup. When booking on Expedia, select "Direct flights only" to find nonstop options. Fly to Roundup from any of these top cities:

  • Sidney
  • Denver
  • Salt Lake City
  • Seattle
  • Glendive

How to find a cheap flight to Roundup?
To get cheap flights to Roundup, book well in advance or visit during the off-peak months of January and March. Like another tip? Depart on a Thursday and save around 16% on average compared to those who travel on a Sunday.* Set up price tracking on the Expedia app and we'll get in touch as soon as your fares drop.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
How to get a cheap last-minute flight to Roundup?
It's possible to get good deals on last-minute departures to Roundup, especially if your travel arrangements aren't set in stone. Think about leaving from a different airport, tweaking your trip dates or picking an alternative airline to get a cheap flight to Roundup.
How far in advance should I book a flight to Roundup?
Secure your flight to Roundup two to four months ahead if you're jetting in from an international destination. For domestic travel, the usual timeframe is 28 days in advance. Cheaper tickets and a greater choice of travel dates, schedules and seating options are some of the great reasons to book early.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which day of the week is the cheapest day to buy a plane ticket to Roundup?
Sundays are typically the best day to book a cheap flight to Roundup, with savings of about 8% on average compared to Fridays. If you decide to buy tickets on a Friday, expect to spend more as this is typically the most expensive day.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which airlines fly to Roundup?
Roundup is connected to 10 airports worldwide through 5 carriers, with Logan Intl. Airport (BIL) as its primary gateway. Consider these major airlines to Roundup when organizing your journey:

  • Cape Air
  • United Airlines
  • Delta Air Lines
  • Alaska Airlines

Where do you fly into Roundup?
If you're flying to Roundup, the main hub to disembark at is Logan Intl. Airport (BIL). Another option is to fly to Roundup via Lewistown, MT (LWT-Lewistown Municipal).
How far is the airport from central Roundup?
If you're flying into Logan Intl. Airport (BIL), you'll be about 45 mi south of central Roundup.
Can I save money by booking a Roundup trip package?
You could possibly save hundreds of dollars if you lock in a Roundup flight and hotel package deal on Expedia. And you'll make life easier by having all your travel arrangements in one place. Try bundling your flight and hotel with extras like car rentals and tours for your own customized Roundup vacation.
Can I change or cancel my flight to Roundup?
You can typically change or cancel your flight to Roundup within 24 hours of booking. However, keep in mind that some flights are non-refundable. In those cases, you may receive a credit toward a future flight in place of a direct refund. Remember to check the airline's rules and restrictions in your itinerary for exact details. Use Expedia's "Changes included" or "No cancel fee" filters during your search to find cheap flights to Roundup with flexible change policies. For more information, head to our Customer Service Portal.

*Flight schedules are subject to change.

*Available to One Key members.

 

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Travel information

Destination airport
Roundup
Destination airport IATA code
BIL

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