A large rock formation with a tunnel entrance.

Cheap Flights to Keystone: Keystone Flight Deals

View €209 flight on Wed, 28 Oct 2026Opens in a new window

Popular airlines to Keystone

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 15% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Keystone

Prices were available within the past 7 days and start at €209 for one-way flights and €243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Delta
United
KLM
Air France

Frequently asked questions

What is the name of Keystone's airport?
Rapid City Regional Airport (RAP) is the only airport serving Keystone.
How far is RAP from central Keystone?
The journey from RAP to downtown Keystone is reasonably long. You'll need to travel 32 kilometres before you can drop your bags at your city hotel.
What airport is best to fly into Keystone?
Located 32 kilometres from the downtown area, RAP will likely be your first stop in Keystone.
How many airlines fly to Keystone?
With 4 airlines flying to Keystone from at least 6 airports around the globe, your ideal flight is only a few clicks away.
Which airlines fly to Keystone?
The majority of flights to Keystone are offered by United Airlines. The most popular route departs from Denver, and United Airlines flies this route the most frequently.
How many nonstop flights are there to Keystone?
With 90 nonstop flights operating each week, you'll be touching down in Keystone before you can ask, "Are we there yet?"
Where are the most popular flights to Keystone departing from?
Travellers often jet off from Denver, Minneapolis - St. Paul and Dallas airports when flying to Keystone.
How long is the flight to Keystone Airport?
If it's Denver you're leaving behind, you'll be midair for around 1 hour and 18 minutes before you touchdown in Keystone. Terminal to terminal from Minneapolis - St. Paul generally takes 1 hour and 55 minutes and from Dallas, the average flight time is 2 hours and 27 minutes.
How to book the cheapest flight to Keystone?
We've all come across those lucky jet-setters who somehow pick up incredibly cheap fares wherever they go. Want to know how to do it for your Keystone holiday? Don't leave it until the last moment to secure your flight. Also, shop around and compare your options. If your destination has a few airports, you may be able to pick up a better price by flying into one that's further away. Last but not least, another simple way to save a few dollars is be ready to book at a moment's notice. If you see a terrific deal, don't think twice — grab it while the opportunity's there.
Do you have any tips for my flight to Keystone?
Wherever you're jetting in from, flying can be a pleasurable experience if you prepare well enough. We've compiled a list of handy tips and tricks that will help get your Keystone holiday started on the right foot. What to pack in your hand luggage:
  • Travelling on a plane can be a comfortable experience if you take the right gear. Firstly, you'll want a few basic toiletry items, such as a toothbrush and hairbrush, a fresh set of clothes and a good novel. Next, find room in your bag for your phone, tablet and chargers, any vital medications and perhaps a blow-up neck pillow too. Last, but definitely not least, be sure to take your passport, travel papers and your bank cards.
Do not pack the following items in your hand luggage:
  • While the list of prohibited items can differ between airlines, the general rule of thumb is nothing flammable, sharp or explosive. This includes tools, metal cutlery, fuels and bleaching agents. Sporting equipment like ice skates, and items that could harm passengers, such as pepper spray and firearms, won't be allowed on board either.
What to wear on a flight:
  • Choose comfort over style. Prepare for temperature changes by layering up, and pick flat, slightly roomy shoes like sneakers.
  • Deep vein thrombosis (DVT), a blood clotting condition caused by prolonged periods of inactivity, can be a risk on long-haul flights. Walk around the cabin and give your legs a stretch or do some simple exercises in your seat to promote better circulation.
How to get through airport security fast when flying to Keystone?
As savvy travellers know, the secret is to be well organised before you get to the airport security gate. That way, you'll be hopping onto that plane to Keystone before you know it. Follow these helpful tips and get your trip off to a flying start:
  • Security personnel first need to verify that you have a valid passport and matching boarding pass before anything else. Have them ready to show.
  • After that, both you and your hand luggage will be X-rayed. To make the process quick and painless, take off anything that might trigger the alarms. Personal belongings like your coat, belt and earphones will be required to go through the machine.
  • For just a few minutes, you'll need to unplug from technology. Your phone, laptop and any other electronic devices also need to be sent through the scanner.
  • Remove gels and liquids from your carry-on bag. They often need to be sent through the X-ray scanner separately. Each product should be in a container no larger than 3.4 ounces (100 millilitres) and everything must fit in a single quart-size (one litre), clear zip-close bag.
  • The right choice of footwear can save you several valuable minutes. Boots and bulky shoes are often required to be removed and separately scanned. Slip-on sneakers are usually not.
  • Airlines will not allow any pocket knives or other sharp items in your carry-on baggage. If you need to bring these kinds of items, pack them in your checked baggage.

Book with confidence

Expedia.ie is an online travel company that specialises in securing the best prices for flights to Keystone. With Expedia you get highly specialised services, combining the best of technology, in-depth knowledge and the best connections in order to offer great deals to Keystone. Expedia shares your passion for travel and has built the best online travel service that promotes and encourages travel. Whether you are looking for cheap flights to Keystone, or are just on the lookout for the best flights to Keystone, you are sure to find the best deals with Expedia.ie.

"One of the many benefits of booking your flights through Expedia is that we are one of the world’s largest online travel agency, which means we use our collective experience and work tirelessly to bring you the best prices. With Expedia you get a user-friendly internet experience and a dedicated customer support service that ensures that everything goes smoothly. The goal of Expedia is to offer premium services at the lowest price, all at one single place. If you wish to save even more try combing a hotel in Keystone to your flight and create a personalised low cost city break or holiday to your favourite destination. Book early and you could save even more!

If you have an Expedia.ie itinerary number and have a question or concern about your travel plans you can call us on (01) 524 5005 from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends and an Expedia agent will help you.

Travel information

Destination airport
Rapid City Regional
Destination airport IATA code
RAP
Destination city name
Rapid City
Return price
€243

Explore a world of travel with Expedia

*Available to Expedia members.