At IAD, security queues can be long, especially in the afternoon. Plan extra time for check-in and security to avoid stress before your flight.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $244 (Kiwi.com) |
One-way from | $93 (American Airlines) |
Popular in | December |
Cheapest in | September |
Average price | $629 |
Good round-trip deal | $309 or less |
Good one-way deal | $196 or less |
Fly from
Fly to
Route
Depart
Return
Price
BaltimoreCancún
BWI - CUN
BWICUN
Baltimore/Washington
Sun 1/18
7:00 am-10:57 am
Nonstop3h 57m
Cancun
Mon 2/2
11:52 am-3:14 pm
Nonstop3h 22m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Wed 12/31
7:20 am-1:07 pm
1 stop5h 47m
Cancun
Thu 1/15
11:55 am-10:31 pm
1 stop10h 36m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Mon 1/19
7:30 am-1:03 pm
1 stop5h 33m
Cancun
Thu 1/22
9:47 am-6:00 pm
1 stop8h 13m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Sat 1/10
7:30 am-1:03 pm
1 stop5h 33m
Cancun
Tue 1/13
9:47 am-6:00 pm
1 stop8h 13m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Mon 1/12
8:29 am-12:20 pm
Nonstop3h 51m
Cancun
Thu 1/15
5:09 pm-8:29 pm
Nonstop3h 20m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Mon 1/26
6:00 am-1:35 pm
1 stop7h 35m
Cancun
Wed 2/4
2:22 pm-10:31 pm
1 stop8h 09m
BaltimoreCancún
BWI - CUN
BWICUN
Baltimore/Washington
Wed 4/22
11:30 am-2:10 pm
Nonstop3h 40m
Cancun
Wed 4/29
3:00 pm-7:25 pm
Nonstop3h 25m
Washington, D.C.Cancún
IAD - CUN
IADCUN
Washington, D.C. Dulles Intl
Fri 1/30
12:46 pm-4:40 pm
Nonstop3h 54m
Cancun
Mon 2/2
12:28 pm-8:49 pm
1 stop8h 21m
BaltimoreCancún
BWI - CUN
BWICUN
Baltimore/Washington
Wed 1/14
6:00 am-6:47 pm
2 stops12h 47m
Cancun
Tue 1/20
12:35 pm-12:41 am
2 stops12h 06m
BaltimoreCancún
BWI - CUN
BWICUN
Baltimore/Washington
Mon 4/13
7:00 am-7:03 pm
2 stops13h 03m
Cancun
Fri 4/17
11:34 am-12:15 am
2 stops11h 41m
| 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 Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The best time to book flights from Washington, D.C. to Cancún is 43 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, April is the cheapest month in which you can book a flight from Washington, D.C. to Cancún (average of $205). Flying from Washington, D.C. to Cancún in June is currently the most expensive (average of $261). 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.
When flying from Washington, D.C. to Cancún, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 31% versus a flight in the afternoon.
Travelers seeking maximum savings on their Washington, D.C. to Cancún flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from WAS to CUN are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
Atlanta (ATL) – chosen by Cheapflights users on 83% of 1-stop itineraries from Washington, D.C. to Cancún on Cheapflights.
Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $315.
Flights via Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 5h 51m.
Flights via Mexico City (MEX) offer the fastest connection on this route, with an average layover time of 1h 10m.
About 10% of weekly flights between Washington, D.C. and Cancún have experienced delays in the past year, with the average delay time being 128 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.
Wednesday tends to have the lowest number of delays on this route, whereas Sunday 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.
Food
Entertainment
Comfort
Boarding
Crew
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Comfort
Boarding
Crew
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Comfort
Boarding
Crew
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Comfort
Boarding
Crew
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Comfort
Boarding
Crew
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Entertainment
Comfort
Boarding
Crew
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$134 | Average$426 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$194 | Average$487 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$248 | Average$423 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$252 | Average$489 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$275 | Average$581 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$283 | Average$574 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$286 | Average$349 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$314 | Average$550 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$365 | Average$461 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$490 | Average$653 | FlexibilityNo cancel fee | On-time63% |