DEN - SLU

$2,089 Find Cheap Flights from Denver to Castries

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Castries departing on 10/31. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Castries

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Castries, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Castries, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Denver to Castries (DEN-SLU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Castries that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Castries

Fri, Oct 31 - Fri, Nov 7
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9:53 am - 1:10 pmDEN-SLU
25h 17m2 stops
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12:15 pm - 4:40 pmSLU-DEN
31h 25m2 stops
$2,089
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Thu, Oct 23 - Tue, Oct 28
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1:25 pm - 11:30 amDEN-SLU
20h 05m2 stops
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7:30 am - 10:23 amSLU-DEN
28h 53m2 stops
$2,734
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Wed, Nov 12 - Wed, Nov 19
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1:25 pm - 1:10 pmDEN-SLU
44h 45m2 stops
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10:25 am - 10:23 amSLU-DEN
26h 58m2 stops
$2,788
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Thu, Dec 18 - Thu, Jan 1
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9:45 am - 11:30 amDEN-SLU
22h 45m2 stops
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6:20 pm - 4:40 pmSLU-DEN
25h 20m2 stops
$3,388
Find Deal
Fri, Oct 31 - Fri, Nov 7
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1:25 pm - 1:10 pmDEN-SLU
21h 45m2 stops
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12:15 pm - 10:23 amSLU-DEN
49h 08m3 stops
$3,647
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Tue, Jan 6 - Wed, Jan 14
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1:25 pm - 9:30 amDEN-SLU
17h 05m2 stops
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10:25 am - 10:23 amSLU-DEN
50h 58m2 stops
$3,977
Find Deal
Booking Insights

KAYAK's insights & trends for Denver to Castries flights

Get data-powered insights and trends into flights from Denver to Castries to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Denver to Castries?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Castries, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Castries is September, where tickets cost $515 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,130 and $1,007 respectively.

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Good to know

Low seasonJanuary
Cheapest flight$2,089
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Denver to Castries

When to book flights from Denver to Castries

Are your dates flexible? Find out the best times to travel from Denver to Castries based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Castries

  • What is the cheapest flight from Denver to Castries?

    In the last 3 days, the lowest price for a flight from Denver to Castries was $2,089 for a round-trip ticket.

  • Do I need a passport to fly between Denver and Castries?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Denver and on arrival in Castries.

  • Which aircraft models fly most regularly from Denver to Castries?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Denver to Castries?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Castries.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Castries?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Castries from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Castries?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Castries with an airline and back to Denver with another airline. Booking your flights between Denver and SLU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Castries?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Castries from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Denver to Castries

 
See real verified KAYAK customer reviews for airlines flying from Denver to Castries. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Castries? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 10000 reviews
7.2Comfort
6.5Food
8.0Crew
6.9Entertainment
7.5Boarding
Airline reviews

We had to turn around and head back to Manchester. Problem with a plane engine.

2.0 MediocreAnonymous, Jul 2025MHT - CLT
Read more American Airlines reviews

We had to turn around and head back to Manchester. Problem with a plane engine.

Flight was delayed. Staff at the gate effectively and proactively communicated about the delay.

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

Everything you need to know for your flight from Denver to Castries

Information on your arrival and departure airports

Denver (DEN)
Castries (SLU)

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