S$142 Cheap Flights to Castle Rock

View S$142 flight on Mon, 12 Jan, 2026Opens in a new window

Popular airlines to Castle Rock

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Cheap round-trip flights to Castle Rock

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 11 Jul - Sat, 18 Jul
PDX
Portland
DEN
Denver
S$376 Return, found 19 hours ago
S$376
Return
found 19 hours ago
Select Delta flight, departing Sat, 11 Jul from Portland to Denver, returning Sat, 18 Jul, priced at S$376 found 19 hours ago
American Airlines
Wed, 10 Dec - Mon, 15 Dec
PVD
Providence
DEN
Denver
S$389 Return, found 3 days ago
S$389
Return
found 3 days ago
Select American Airlines flight, departing Wed, 10 Dec from Providence to Denver, returning Mon, 15 Dec, priced at S$389 found 3 days ago
United
Sat, 11 Jul - Sat, 18 Jul
PDX
Portland
DEN
Denver
S$422 Return, found 19 hours ago
S$422
Return
found 19 hours ago
Select United flight, departing Sat, 11 Jul from Portland to Denver, returning Sat, 18 Jul, priced at S$422 found 19 hours ago
Air Canada
Tue, 3 Mar - Tue, 17 Mar
SIN
Singapore
DEN
Denver
S$1,147 Return, found 21 hours ago
S$1,147
Return
found 21 hours ago
Select Air Canada flight, departing Tue, 3 Mar from Singapore to Denver, returning Tue, 17 Mar, priced at S$1,147 found 21 hours ago
STARLUX Airlines
Tue, 10 Mar - Wed, 25 Mar
SIN
Singapore
DEN
Denver
S$1,318 Return, found 1 day ago
S$1,318
Return
found 1 day ago
Select STARLUX Airlines flight, departing Tue, 10 Mar from Singapore to Denver, returning Wed, 25 Mar, priced at S$1,318 found 1 day ago

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

October is typically the cheapest month to fly

From S$150 - S$246 per traveller.

Find Your Flights to Castle Rock DEN

Cheap flights to Castle Rock (DEN)

Get started finding a cheap flight to Castle Rock on Expedia by either choosing a deal on this page or using the search bar to enter your travel dates, origin airport and whether you want a return or one-way airfare. You can filter for flexibility, number of stops, airline and departure/arrival times to find the best flight for you.

We recommend using the ‘Flexible Dates’ calendar at the top of the page to see the price of plane tickets on the surrounding dates. This allows you to pick the cheapest days to fly if your trip allows flexibility and score cheap flight deals to Castle Rock.

Return prices range from S$376 - S$1,318 and one-ways Castle Rock start as low as S$142.

Be aware that choosing a non-stop flight can sometimes be more expensive while saving you time. And routes with connections may be available at a cheaper rate.

 

Airlines that fly to Castle Rock (DEN)

You have several options for which airline you choose to travel with to Castle Rock. There are 10 airlines flying into DEN: Delta, United, American Airlines, China Airlines, STARLUX Airlines, Air Canada. 

Cheap plane tickets may be available from different airlines at different times and with unique terms. It’s best to understand the details of each airline’s offer before judging its value.

For example, if you plan to check in a bag or bring hand baggage, it's worth checking whether the cheap airfare deal includes a baggage allowance. If not, verify whether the baggage fee is higher than the difference of other airline plane ticket deals offering free checked in/hand baggage in exchange for a slightly higher airfare. 

Additionally, your preferred frequent flyer membership programmes may influence your choice of cheap airline. Expedia allows you to enter your membership numbers during checkout to earn points from your airline and Expedia Rewards—all while getting a great deal and planning all your travel on one online platform.

 

Find the best deals

At Expedia, we source many flight deals from multiple providers, so you can easily find the best deals that are right for you. A great strategy for getting the best deals can be to make sure you book and travel at optimal times. Airfare to Castle Rock (DEN) varies throughout the year based on seasonal demand. You’ll see the lowest rates for return trips to DEN in July and in January for one-ways.

 

Cancellation & flexibility

To change or cancel eligible flights, go to ‘My Trips’ and navigate to your itinerary. If you booked within the last 24 hours, you might be able to cancel your flight for free. Learn more about flight changes or cancellations from our customer service portal. Some plane tickets are available with no change fees, which you can filter for during your search.

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
S$375

Trending flights to Castle Rock

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, 3 Mar - Tue, 17 Mar
SIN
Singapore
DEN
Denver
S$1,147 Return, found 21 hours ago
S$1,147
Return
found 21 hours ago
Select Air Canada flight, departing Tue, 3 Mar from Singapore to Denver, returning Tue, 17 Mar, priced at S$1,147 found 21 hours ago
*Available to Expedia members.