Expect long security queues at IAD, especially in the afternoon. Plan extra time for check-in and security to avoid delays.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $321 (Kiwi.com) |
One-way from | $136 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $622 |
Good round-trip deal | $470 or less |
Good one-way deal | $193 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Wed 3/4
12:46 pm-4:40 pm
Nonstop3h 54m
Cancun
Wed 3/11
11:40 am-3:55 pm
Nonstop3h 15m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Sun 12/7
12:46 pm-4:40 pm
Nonstop3h 54m
Cancun
Thu 12/11
12:35 pm-3:55 pm
Nonstop3h 20m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Sun 2/15
6:00 am-6:47 pm
2 stops12h 47m
Cancun
Wed 2/18
6:06 am-1:45 pm
1 stop7h 39m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Mon 3/30
7:50 pm-12:01 pm
2 stops17h 11m
Cancun
Thu 4/2
6:03 am-3:17 pm
1 stop8h 14m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Wed 1/14
12:46 pm-4:40 pm
Nonstop3h 54m
Cancun
Sun 1/18
12:35 pm-3:55 pm
Nonstop3h 20m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Thu 1/29
12:46 pm-4:40 pm
Nonstop3h 54m
Cancun
Thu 2/5
5:09 pm-8:29 pm
Nonstop3h 20m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Tue 1/13
8:29 am-12:20 pm
Nonstop3h 51m
Cancun
Sat 1/17
5:09 pm-8:29 pm
Nonstop3h 20m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Sat 12/13
12:46 pm-4:40 pm
Nonstop3h 54m
Cancun
Thu 12/18
12:35 pm-3:55 pm
Nonstop3h 20m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Tue 2/17
8:29 am-12:20 pm
Nonstop3h 51m
Cancun
Tue 2/24
5:09 pm-8:29 pm
Nonstop3h 20m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Sun 2/15
12:46 pm-4:40 pm
Nonstop3h 54m
Cancun
Wed 2/18
5:09 pm-8:29 pm
Nonstop3h 20m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
Booking 43 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to Cancún. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Cancún (average of $210). Flying from Washington, D.C. Dulles Intl Airport to Cancún in June is currently the most expensive (average of $450). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Cancún is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 48% on airfare.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Cancún flight should consider departing on Sunday evenings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
About 10% of weekly flights between Washington, D.C. and Cancún have experienced delays in the past year, with the average delay time being 130 minutes.
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
Friday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.
Over the last year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.
Atlanta (ATL) – chosen by Cheapflights users on 67% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Cancún on Cheapflights.
Flights via Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 7h 37m.
Flights via Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 7h 37m.
Flights via Mexico City (MEX) offer the fastest connection on this route, with an average layover time of 1h 15m.
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$131 | Average$417 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$205 | Average$494 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$284 | Average$463 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$351 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$314 | Average$544 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$387 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$351 | Average$626 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$391 | Average$613 | FlexibilityNo cancel fee | On-time69% |