$119 Cheap Flights from Washington (IAD) to Cancun (CUN)

View $119 flight on Mon, Oct 13, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Washington to Cancun (IAD-CUN)

Prices were available within the past 7 days and start at $119 for one-way flights and $255 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Oct 5 - Fri, Oct 10
IAD
Washington
CUN
Cancun
$255 Roundtrip, found 13 hours ago
$255
Roundtrip
found 13 hours ago
Select United flight, departing Sun, Oct 5 from Washington to Cancun, returning Fri, Oct 10, priced at $255 found 13 hours ago
United
Mon, Oct 13 - Fri, Oct 17
IAD
Washington
CUN
Cancun
$260 Roundtrip, found 1 hour ago
$260
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Oct 13 from Washington to Cancun, returning Fri, Oct 17, priced at $260 found 1 hour ago
United
Sun, Oct 5 - Wed, Oct 15
IAD
Washington
CUN
Cancun
$265 Roundtrip, found 2 hours ago
$265
Roundtrip
found 2 hours ago
Select United flight, departing Sun, Oct 5 from Washington to Cancun, returning Wed, Oct 15, priced at $265 found 2 hours ago
American Airlines
Fri, Oct 17 - Fri, Oct 24
IAD
Washington
CUN
Cancun
$266 Roundtrip, found 2 hours ago
$266
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Fri, Oct 17 from Washington to Cancun, returning Fri, Oct 24, priced at $266 found 2 hours ago
American Airlines
Mon, Oct 13 - Fri, Oct 17
IAD
Washington
CUN
Cancun
$268 Roundtrip, found 1 hour ago
$268
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Mon, Oct 13 from Washington to Cancun, returning Fri, Oct 17, priced at $268 found 1 hour ago
United
Mon, Oct 13 - Fri, Oct 17
IAD
Washington
CUN
Cancun
$269 Roundtrip, found 1 hour ago
$269
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Oct 13 from Washington to Cancun, returning Fri, Oct 17, priced at $269 found 1 hour ago
United
Mon, Oct 13 - Fri, Oct 17
IAD
Washington
CUN
Cancun
$273 Roundtrip, found 1 hour ago
$273
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Oct 13 from Washington to Cancun, returning Fri, Oct 17, priced at $273 found 1 hour ago
Delta
Fri, Oct 10 - Wed, Oct 15
IAD
Washington
CUN
Cancun
$283 Roundtrip, found 13 hours ago
$283
Roundtrip
found 13 hours ago
Select Delta flight, departing Fri, Oct 10 from Washington to Cancun, returning Wed, Oct 15, priced at $283 found 13 hours ago
Aeromexico
Mon, Oct 13 - Fri, Oct 17
IAD
Washington
CUN
Cancun
$291 Roundtrip, found 1 hour ago
$291
Roundtrip
found 1 hour ago
Select Aeromexico flight, departing Mon, Oct 13 from Washington to Cancun, returning Fri, Oct 17, priced at $291 found 1 hour ago
Air Canada
Thu, Sep 25 - Mon, Sep 29
IAD
Washington
CUN
Cancun
$353 Roundtrip, found 4 hours ago
$353
Roundtrip
found 4 hours ago
Select Air Canada flight, departing Thu, Sep 25 from Washington to Cancun, returning Mon, Sep 29, priced at $353 found 4 hours ago

Find the cheapest month to fly from Washington (IAD) to Cancun (CUN)

September is typically the cheapest month to fly

From $259 - $388 per traveler.

Graph displaying average flight prices per month

Alternative airports near Cancun

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

Select flight to Cancun Intl. CUN. Cheapest and Closest option available. Average driving time to city center is 18 minutes. Flights from $310
CUN
Cancun Intl.
CheapestClosest
Average driving time to city center18 min
Flights from $310
Flights from Washington (IAD) to Cancun (CUN)
Origin airport
Washington Dulles Intl.
Destination airport
Cancun Intl.
Airlines serving
Aeromexico, Air Canada, Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$254
Distance
1358 mi
Average flight time
2 hours 38 mins

Washington to Cancun Flights

The cheapest times to fly from Washington to Cancun

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Cancun are during the month of October. You can find some of the cheapest flights from Washington to Cancun with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Cancun

Sunday is one of the best days to book for cheap flights from Washington to Cancun: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Cancun

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Cancun in 2025. You can also book with separate airlines for your outbound and return journeys, from $119 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Cancun flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Cancun airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN) cost?
Cheap round-trip fares from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN) start from $252. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United and Spirit Airlines flight leaving IAD on August 10 2025 and touching down at CUN. The price was last updated on July 14 2025 and has not changed since.
What is the cheapest month to fly from IAD to CUN?
The cheapest flights from IAD to CUN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)?
You can travel nonstop from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN) on a United Airlines flight.
What is the cheapest airline that flies from IAD to CUN?
With prices starting from $119 for a one-way flight from IAD to CUN, United is currently the cheapest airline on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on September 12 2025. Prices were last updated on July 14 2025 and have not changed since.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)?
With an average of 2 nonstop flights departing from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN) daily, you'll be taking off on vacation soon enough.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)?
More people fly between IAD and CUN at 8 AM than at any other time. Rather go when it's quieter? Consider flying outside peak hours and it's possible you'll save on your fare as well.
What day of the week has the most flights from IAD to CUN?
If you fly on a Friday, you'll get the largest range of options for flights from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN).
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)?
Hop on the earliest flight at around 8:30AM UTC-5, leaving from Washington Dulles Intl. Airport (IAD). You'll be in the air for roughly 3h 50m, coming in to land at Cancun Intl. Airport (CUN) at approximately 12:20PM UTC-5.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)?
It takes about 3 hours and 50 minutes to fly the 1,350 mi from IAD to CUN.
What airline has the least delays from IAD to CUN?
Consider booking with United Airlines if you'd like to fly straight from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN) without any delays. This carrier has the best track record for punctuality, with an on-time performance of 92%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN) route, fly before 3 PM. Departures after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Cancun from Washington Dulles Intl. Airport (IAD)?
Cancun Intl. Airport (CUN) is the only airport in Cancun with direct flights from Washington Dulles Intl. Airport (IAD). Browse your options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN) last-minute?
Holding off until just before your departure to book your flight from IAD to CUN generally means paying more. While it's possible to find some last-minute offers, they aren't always guaranteed. Allow some flexibility in your schedule to maximize your chances of landing a bargain.
Is it cheaper to book an IAD to CUN flight and hotel package?
You can save money by booking an IAD to CUN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've selected your ideal accommodations and flights, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Cancun Intl. Airport (CUN)?
If you booked your IAD to CUN flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Explore a world of travel with Expedia

*Available to One Key members.