Southwest Airlines flights from Phoenix (PHX) to Washington (IAD)
Find comprehensive Southwest Airlines flight information, schedules, and booking details for direct flights from Phoenix (PHX), US to Washington (IAD), US. Southwest Airlines operates 2-4 flights daily flights on this route.• Flight Duration: 4h 00m - 4h 25m (average flight time)• Distance: 1963 miles (3158 km) (air miles between airports)• Daily Flights: 2-4 flights (scheduled departures per day)
Phoenix (PHX)
US
Washington (IAD)
US
FLIGHT TIME
4h 00m - 4h 25m
FLIGHT DISTANCE
1963 miles (3158 km)
4h 10m - 4h 10m
11:20
11:20
1963 miles (3158 km)
March
1 (Show)
30
Southwest Airlines Terminal Information & Contact
Departure Terminal - Phoenix (PHX)
Terminal: 4
Phone: 800-435-9792
Location: 4, Phoenix, US
Arrival Terminal - Washington (IAD)
Terminal: 1
Phone: 800-435-9792
Location: 1, Washington, US
Southwest Airlines Flight Schedule from Phoenix (PHX) to Washington (IAD)
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
WN1590 |  Southwest Airlines | 11:20 | 17:30:00 | Boeing 737-700 (winglets) Passenger/BBJ1 |
Southwest Airlines Monthly Flight Calendar
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Route Insights
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 11:00, offering more flight options and potentially better connections.
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Southwest Airlines Terminal Information
Departure Terminal at Phoenix (PHX):
• Terminal : Southwest Airlines operates from this terminal
Terminal 4:
• 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
Frequently Asked Questions about Southwest Airlines Flights
How many Southwest Airlines flights operate from Phoenix (PHX) to Washington (IAD)?
Southwest Airlines operates 1 flight from Phoenix (PHX) to Washington (IAD).
What city does Washington (IAD) airport serve?
Washington (IAD) airport serves Washington, US.
How long is the Southwest Airlines flight from Phoenix (PHX) to Washington (IAD)?
The flight duration is approximately 4h 00m - 4h 25m.
What is the distance from Phoenix (PHX) to Washington (IAD)?
The distance is 1963 miles (3158 km).
What aircraft does Southwest Airlines use on this route?
Southwest Airlines uses Boeing 737-700 (winglets) Passenger/BBJ1 on this route.
Which other airlines operate on this route?
1 other airline operates on this route: United Airlines.
Which terminal does Southwest Airlines use at Phoenix (PHX)?
Southwest Airlines flights from Phoenix (PHX) depart from Terminal 4. Terminal 4 phone: 800-435-9792.
What is the Southwest Airlines terminal phone number at Phoenix (PHX)?
The Southwest Airlines terminal phone number at Phoenix (PHX) is 800-435-9792 (Terminal 4).
Which terminal does Southwest Airlines use at Washington (IAD)?
Southwest Airlines flights to Washington (IAD) arrive at Terminal 1. Terminal 1 phone: 800-435-9792.
What is the Southwest Airlines terminal phone number at Washington (IAD)?
The Southwest Airlines terminal phone number at Washington (IAD) is 800-435-9792 (Terminal 1).
What is the cheapest month to fly Southwest Airlines from Phoenix (PHX) to Washington (IAD)?
March is typically the cheapest month to fly Southwest Airlines on this route.
What is the average price for a Southwest Airlines flight from Phoenix (PHX) to Washington (IAD)?
The average price for a round-trip Southwest Airlines flight on this route is approximately $640. Prices can vary based on booking time and demand.
How many Southwest Airlines flights operate per week on this route?
Southwest Airlines operates approximately 30 flights per week from Phoenix (PHX) to Washington (IAD).
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/