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 | $235 (Kiwi.com) |
One-way from | $91 (Super.com) |
Popular in | December |
Cheapest in | September |
Average price | $638 |
Good round-trip deal | $300 or less |
Good one-way deal | $166 or less |
Fly from
Fly to
Route
Depart
Return
Price
BaltimoreCancún
BWI - CUN
BWICUN
Baltimore/Washington
Sun 3/1
6:20 am-12:20 pm
1 stop6h 00m
Cancun
Thu 3/5
11:55 am-3:15 pm
Nonstop3h 20m
BaltimoreCancún
BWI - CUN
BWICUN
Baltimore/Washington
Wed 1/28
8:08 pm-1:02 pm
1 stop16h 54m
Cancun
Tue 2/3
11:52 am-3:14 pm
Nonstop3h 22m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Tue 2/17
9:00 am-3:47 pm
1 stop6h 47m
Cancun
Thu 2/19
2:23 pm-10:59 pm
1 stop8h 36m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Mon 2/2
7:30 am-1:03 pm
1 stop5h 33m
Cancun
Thu 2/5
11:55 am-7:18 pm
1 stop7h 23m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Tue 1/27
6:00 am-1:35 pm
1 stop7h 35m
Cancun
Fri 1/30
11:55 am-7:18 pm
1 stop7h 23m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Sun 2/1
7:30 am-1:03 pm
1 stop5h 33m
Cancun
Tue 2/10
2:41 pm-10:47 pm
1 stop8h 06m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Mon 1/12
7:30 am-1:03 pm
1 stop5h 33m
Cancun
Thu 1/15
4:20 pm-10:59 pm
1 stop6h 39m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Tue 3/3
10:50 am-5:38 pm
1 stop6h 48m
Cancun
Fri 3/6
3:10 pm-10:59 pm
1 stop7h 49m
Washington, D.C.Cancún
DCA - CUN
DCACUN
Washington, D.C. Reagan-National
Mon 3/2
9:00 am-3:47 pm
1 stop6h 47m
Cancun
Tue 3/10
2:09 pm-10:59 pm
1 stop7h 50m
BaltimoreCancún
BWI - CUN
BWICUN
Baltimore/Washington
Thu 1/1
10:42 am-2:33 pm
Nonstop3h 51m
Cancun
Thu 1/15
11:52 am-3:14 pm
Nonstop3h 22m
| 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, February is the cheapest month in which you can book a flight from Washington, D.C. to Cancún (average of $197). Flying from Washington, D.C. to Cancún in June is currently the most expensive (average of $263). 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.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to Cancún as you normally would.
The most flights from WAS to CUN are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).
Atlanta (ATL) – chosen by Cheapflights users on 91% 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 15m.
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.
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Crew
Overall
Boarding
Food
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$134 | Average$424 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$194 | Average$487 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$231 | Average$410 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$252 | Average$487 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$275 | Average$580 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$284 | Average$574 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$286 | Average$349 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$305 | Average$549 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$361 | Average$461 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$491 | Average$611 | FlexibilityNo cancel fee | On-time63% |