Flights operate between Denver (DEN) and Washington (IAD).
1 airline operates this route with 6-14 flights daily flights.
Average flight time is 3h 05m - 3h 35m.
Route distance is 1457 miles (2344 km).
Route Distance
1457 miles (2344 km)
Average Duration
3h 05m - 3h 35m
Airlines Operating This Route
Southwest Airlines
Flight Frequency
Daily Flights
6-14 flights
Weekly Flights
67
Typical Departure Time Ranges
Earliest Departure
07:45
Latest Departure
18:10
Route Intelligence Dashboard
Overall Connectivity Score
70
GoodRoute Diversity
1
Direct Routes
Southwest Airlines serves 1 destination from DEN
Weekly Frequency
21
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| DEN → Washington (IAD) (IAD) | 21/week | 3h 05m - 3h 35m | 1,457 km | Moderate |
Flight Schedule & Filters
Southwest Airlines flights from Denver (DEN) to Washington (IAD)
Southwest Airlines operates scheduled nonstop flights between Denver (DEN) and Washington (IAD). Southwest Airlines operates 6-14 flights daily flights on this route.• Flight Duration: 3h 05m - 3h 35m (average flight time)• Distance: 1457 miles (2344 km) (air miles between airports)• Daily Flights: 6-14 flights (scheduled departures per day)
Denver (DEN)
US
Washington (IAD)
US
FLIGHT TIME
3h 05m - 3h 35m
FLIGHT DISTANCE
1457 miles (2344 km)
3h 10m - 3h 20m
07:45
18:10
1457 miles (2344 km)
February
1 (Show)
67
Southwest Airlines Terminal Information & Contact
Departure Terminal - Denver (DEN)
Terminal: 1
Phone: 800-435-9792
Location: 1, Denver, US
Arrival Terminal - Washington (IAD)
Terminal: 1
Phone: 800-435-9792
Location: 1, Washington, US
Southwest Airlines Flight Schedule from Denver (DEN) to Washington (IAD)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
WN1762 |  Southwest Airlines | 07:45 | 13:05:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
WN2474 | Southwest Airlines | 14:00 | 19:10:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
WN820 | Southwest Airlines | 18:10 | 23:25:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
Southwest Airlines Monthly Flight Calendar
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Southwest Airlines Terminal Information
Departure Terminal at Denver (DEN):
• Terminal : Southwest Airlines operates from this terminal
Terminal 1:
• Southwest Airlines Terminal Phone: 800-435-9792
Arrival Terminal at Washington (IAD):
• Terminal : Southwest Airlines operates from this terminal
Terminal 1:
• Southwest Airlines Terminal Phone: 800-435-9792
Weather & Climate at Washington (IAD)
14.4°C
Avg Temperature88mm
Avg Rainfall10.3km/h
Avg Wind Speed66%
Avg HumidityBest Months to Visit
Challenging Months
12-Month Weather Overview
Wind Speed by Month
Humidity by Month
Best Time to Book Flights to Washington (IAD)
Best Booking Window
Book 2-3 months in advance for best prices
Booking Tip
Avoid booking during extreme weather months for better deals
Peak Travel Months
Expect higher prices and more crowds during these months. Book early to secure better rates.
Recommended Months
These months offer the best balance of weather, prices, and availability.
Monthly Booking Recommendations
Flight Price Trends for Washington (IAD)
Cheapest Months to Fly
Book flights during these months for the best deals and lowest prices.
Most Expensive Months
Prices are typically highest during these months. Consider booking well in advance or choosing alternative dates.
Price Trend Analysis
Prices are typically lower during shoulder seasons
Monthly Price Trends
Best Months to Fly Southwest Airlines to Washington (IAD)
Best Months
Optimal conditions for travel with favorable weather, prices, and availability.
Shoulder Season
Transition periods with moderate conditions. Good balance of price and experience.
Challenging Months
These months may have less favorable conditions. Plan accordingly and book early.
Seasonal Insight
Best travel months: 2025-08
Seasonal Travel Calendar
Southwest Airlines Contact Information and Customer Services
Southwest Airlines Address
2702 Love Field Dr
Dallas, TX 75235, US
Customer Service Phone
800-435-9792Official Website
southwest.com/Frequently Asked Questions
How many Southwest Airlines flights operate from Denver (DEN) to Washington (IAD)?
Southwest Airlines operates 3 flights from Denver (DEN) to Washington (IAD).
What city does Washington (IAD) airport serve?
Washington (IAD) airport serves Washington, US.
How long is the Southwest Airlines flight from Denver (DEN) to Washington (IAD)?
The flight duration is approximately 3h 05m - 3h 35m.
What is the distance from Denver (DEN) to Washington (IAD)?
The distance is 1457 miles (2344 km).
What aircraft does Southwest Airlines use on this route?
Southwest Airlines uses Boeing 737-800 (winglets) Passenger/BBJ2 on this route.
Which other airlines operate on this route?
1 other airline operates on this route: United Airlines.
What are the earliest and latest Southwest Airlines flight departure times?
The earliest Southwest Airlines flight departs at 07:45 and the latest departs at 18:10.
View all Southwest Airlines flights to Denver (DEN) →
Popular Southwest Airlines routes from Denver include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.