Cheap Flights to Castle Rock: Castle Rock Flight Deals

View €69 flight on Fri, 6 Feb 2026Opens in a new window

Popular airlines to Castle Rock

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Cheap round-trip flights to Castle Rock

Prices were available within the past 7 days and start at €69 for one-way flights and €137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Fri, 6 Feb - Sun, 8 Feb
BOS
Boston
DEN
Denver
€137 Return, found 4 days ago
€137
Return
found 4 days ago
Select JetBlue Airways flight, departing Fri, 6 Feb from Boston to Denver, returning Sun, 8 Feb, priced at €137 found 4 days ago
Delta
Sat, 6 Dec - Mon, 15 Dec
BOS
Boston
DEN
Denver
€149 Return, found 6 days ago
€149
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Dec from Boston to Denver, returning Mon, 15 Dec, priced at €149 found 6 days ago
American Airlines
Fri, 6 Feb - Sun, 8 Feb
BOS
Boston
DEN
Denver
€153 Return, found 4 days ago
€153
Return
found 4 days ago
Select American Airlines flight, departing Fri, 6 Feb from Boston to Denver, returning Sun, 8 Feb, priced at €153 found 4 days ago
United
Fri, 5 Dec - Mon, 8 Dec
BOS
Boston
DEN
Denver
€212 Return, found 1 day ago
€212
Return
found 1 day ago
Select United flight, departing Fri, 5 Dec from Boston to Denver, returning Mon, 8 Dec, priced at €212 found 1 day ago
British Airways
Wed, 14 Jan - Wed, 21 Jan
DUB
Dublin
DEN
Denver
€394 Return, found 1 day ago
€394
Return
found 1 day ago
Select British Airways flight, departing Wed, 14 Jan from Dublin to Denver, returning Wed, 21 Jan, priced at €394 found 1 day ago

Find the cheapest month to fly from Columbus (CMH) to Denver (DEN)

September is typically the cheapest month to fly

From €96 - €203 per traveller.

Expedia.ie is an online travel company that specialises in securing the best prices for flights to Castle Rock. 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 Castle Rock. 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 Castle Rock, or are just on the lookout for the best flights to Castle Rock, 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 Castle Rock 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.

Frequently asked questions

What is the name of Castle Rock's airport?
Castle Rock has several airports, but most visitors prefer Denver Intl. Airport (DEN).
What airport is best to fly into Castle Rock?
A flight to Castle Rock means jumping off the plane at either DIA airport or COS. The first is 56 kilometres away from the centre of the city. The second sits 64 kilometres away.
How many airlines fly to Castle Rock?
Castle Rock is serviced by 25 airlines from at least 205 worldwide airports.
Which airlines fly to Castle Rock?
Most often, travellers fly with American Airlines, United Airlines and Frontier Airlines when going to Castle Rock. The largest number of these flights depart from Dallas, with American Airlines servicing this route the most.
How many nonstop flights are there to Castle Rock?
Arranging an unforgettable Castle Rock getaway is a piece of cake when there are 6,115 nonstop flights every week to pick from.
Where are the most popular flights to Castle Rock departing from?
A large number of flights to Castle Rock leave from Dallas, Phoenix and Chicago airports.
How long is the flight to Castle Rock Airport?
If it's Dallas you're leaving behind, you'll be midair for around 2 hours and 6 minutes before you arrive in Castle Rock. Airport to airport from Phoenix takes around 1 hour and 45 minutes and from Chicago, the average flight time is 2 hours and 50 minutes.
How to book the cheapest flight to Castle Rock?
Don't leave locking in your flight to Castle Rock until the last possible moment. That's one move savvy travellers use to get the best deals. Booking well in advance means more options and less expensive flights. Also, look around online and compare your options. If your destination has multiple airports, you may be able to pick up an excellent deal by flying into a less busy terminal. Lastly, be prepared to lock in your seat quickly if you find an irresistible price. It might not be available for too long. With a bit of knowledge and a little luck, the ideal airfare can be yours.
Do you have any tips for my flight to Castle Rock?
If you're not prepared, air travel can be daunting. But don't hit the panic button just yet. Follow these handy hints for a pain-free start to your time in Castle Rock. What to pack in your hand luggage:

  • Travelling on a plane can be a stress-free experience if you take the right stuff. Firstly, you'll need basic toiletry items, such as a toothbrush and hairbrush, a fresh set of clothes and a good book. Next, find a spot in your hand luggage for your laptop, a charger, medications and perhaps a proper neck pillow too. Lastly, be sure to take your passport, travel documents and some cash.

Do not pack the following items in your hand luggage:

  • Double-check that you don't have a Swiss Army knife hiding in one of the compartments of your hand luggage. Other restricted items include flammable or explosive products, like aerosols and matches, and gels and liquids in containers with a volume of more than 3.4 ounces (100 millilitres).

What to wear on a flight:

  • Your main aim is to be as comfortable as possible. Choose slip-on footwear, dress in loose, natural fibers and don't forget to take a sweater in case it gets chilly in the cabin.
  • Deep vein thrombosis (DVT), a blood clot condition caused by extended periods of inactivity, can be a risk on long-haul flights. Try to walk around the cabin and stretch your legs or do some simple exercises in your seat to promote better circulation.

How to get through airport security fast when flying to Castle Rock?
The answer is — be prepared. We've put together some handy tips and tricks for a speedy trip through airport security. Look out Castle Rock, here you come:

  • Security personnel first need to know that you have a valid ID and matching travel documents before you're allowed to proceed any further. Have them close by, ready for inspection.
  • After that, both you and your carry-on luggage must be X-rayed. To speed things up, take off anything that is likely to trigger the alarm. Personal belongings like your coat, belt and earphones need to go through the machine.
  • Your electronic gadgets like phones and laptops will also have to go on a tray to be scanned. Don't worry though, you'll be back online before you know it.
  • Don't forget to remove liquids and gels from your carry-on bag. They usually need to be sent through the X-ray scanner separately. Each item should be in a container no larger than 3.4 ounces (100 millilitres) and everything must fit in a quart-size (one litre), clear zip-lock bag.
  • Slip-on shoes are a good footwear choice as you're less likely to have to remove them when passing through security. Big boots and other heavy-style shoes are often subjected to extra screening.
  • Airlines will not allow any sharp or pointed objects in your hand luggage. If you must bring these kinds of items, pack them in your checked baggage.

Flights to Castle Rock information
Destination airport
Denver Intl.
Destination airport IATA code
DEN
Destination city name
Denver
Return price
€391

Trending flights to Castle Rock

Prices were available within the past 7 days and start at €69 for one-way flights and €137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sun, 21 Dec - Thu, 1 Jan
DUB
Dublin
DEN
Denver
€391 Return, found 5 days ago
€391
Return
found 5 days ago
Select American Airlines flight, departing Sun, 21 Dec from Dublin to Denver, returning Thu, 1 Jan, priced at €391 found 5 days ago
*Available to Expedia members.