Is Southwest the cheapest airline to fly with from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport?

With an average price of $379 return, Southwest is not the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $262 on average.

Does Southwest fly direct to Phoenix Sky Harbor Intl Airport from Washington, D.C. Dulles Intl Airport?

Yes, Southwest does offer direct flights for the route, with around 5 flights per week.

$149 Cheap Southwest Flights from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

IAD - PHX

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Flight Deals

Cheap Southwest Flight Deals from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Here are some of the best deals found on KAYAK recently from Southwest for round-trip flights from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip Southwest flight deals from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Tue, Jan 20 - Thu, Feb 19

4:30 pm - 7:50 pmIAD-PHX

5h 20mnonstop

11:00 am - 5:00 pmPHX-IAD

4h 00mnonstop

$277Southwest

Find Deal

Tue, Jan 20 - Thu, Feb 19

9:05 am - 3:35 pmIAD-PHX

8h 30m1 stop

11:00 am - 5:00 pmPHX-IAD

4h 00mnonstop

$287Southwest

Find Deal

Fri, Oct 31 - Mon, Nov 3

3:50 pm - 5:35 pmIAD-PHX

4h 45mnonstop

11:00 am - 5:05 pmPHX-IAD

4h 05mnonstop

$314Southwest

Find Deal

Tue, Nov 11 - Tue, Nov 18

4:40 pm - 7:40 pmIAD-PHX

5h 00mnonstop

11:00 am - 5:05 pmPHX-IAD

4h 05mnonstop

$315Southwest

Find Deal

Thu, Feb 19 - Wed, Feb 25

4:40 pm - 8:05 pmIAD-PHX

5h 25mnonstop

9:55 am - 9:55 pmPHX-IAD

10h 00m2 stops

$318Southwest

Find Deal

Fri, Oct 31 - Mon, Nov 3

3:50 pm - 5:35 pmIAD-PHX

4h 45mnonstop

7:25 am - 3:45 pmPHX-IAD

6h 20m1 stop

$324Southwest

Find Deal

Wed, Nov 5 - Wed, Nov 12

7:40 am - 2:05 pmIAD-PHX

8h 25m1 stop

11:00 am - 5:05 pmPHX-IAD

4h 05mnonstop

$325Southwest

Find Deal

Thu, Feb 19 - Mon, Feb 23

4:40 pm - 8:05 pmIAD-PHX

5h 25mnonstop

11:00 am - 5:00 pmPHX-IAD

4h 00mnonstop

$327Southwest

Find Deal

Tue, Nov 11 - Tue, Nov 18

7:40 am - 2:10 pmIAD-PHX

8h 30m2 stops

11:00 am - 5:05 pmPHX-IAD

4h 05mnonstop

$330Southwest

Find Deal

Sat, Nov 8 - Wed, Nov 12

5:05 am - 8:10 amIAD-PHX

5h 05mnonstop

11:00 am - 5:05 pmPHX-IAD

4h 05mnonstop

$333Southwest

Find Deal

Useful Info

Low season	July
High season	April
Cheapest flight	$149
Average price round-trip	$405

Best time to beat the crowds with an average 6% drop in price.

Most popular time to fly with an average 6% increase in price.

Flight from Washington Dulles Airport to Phoenix

(price for this month)

When to Book Flights with Southwest from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Average price per month

Flight prices as travel date approaches

Is Southwest the cheapest airline to fly with from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport?
With an average price of $379 return, Southwest is not the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $262 on average.
What is the cheapest Southwest flight from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport?
In the last 3 days, the lowest price for a flight with Southwest from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport was $271 for a return flight and $93 for a one-way flight.
Does Southwest fly direct to Phoenix Sky Harbor Intl Airport from Washington, D.C. Dulles Intl Airport?
Yes, Southwest does offer direct flights for the route, with around 5 flights per week.
What’s the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport with Southwest?
On average, the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport with Southwest is Wednesday, when prices are around $70. The most expensive day is generally Sunday, where the average price is around $138.
What’s the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport with Southwest?
The cheapest month for Southwest flights to Phoenix Sky Harbor Intl Airport from Washington, D.C. Dulles Intl Airport is generally September, where plane tickets cost $143 on average. If possible, try to avoid the most expensive months of March and July, where tickets cost $325 and $343 respectively.

8.0

Very good4,235 verified ratings

7.5Entertainment

8.0Comfort

7.0Food

8.1Boarding

8.6Crew

Pros +

Cons -

Show reviews that mention

2.0 Poor

TODD, Oct 2025

CMH-MDW

2.5 hours late but no one said why.

10.0 Wonderful

Aleksandar, Oct 2025

OAK-SAN

On time, and it was not full flight

4.0 Mediocre

Annette, Oct 2025

LGA-MCI

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

10.0 Wonderful

Gerald, Oct 2025

SJC-PDX

Boarding quick & efficient. Crew was friendly. Arrived early

6.0 Okay

Hung, Oct 2025

PHX-ABQ

mandatory demand customer to check their carry on because not enough people check bags.

8.0 Very good

Annette, Oct 2025

MCI-LGA

Good non stop is always good

10.0 Wonderful

Gabriel, Sep 2025

DEN-SMF

Connecting flight is on time and boarding was a breeze!

10.0 Wonderful

Gabriel, Sep 2025

LGA-DEN

Easy boarding process. No delays!

10.0 Wonderful

Melissa, Sep 2025

MDW-DTW

Excellent

10.0 Wonderful

Melissa, Sep 2025

MSY-MDW

Excellent. Would encourage Southwest to keep current boarding procedures with free style seating. Makes for a fantastic experience

Everything you need to know for your flight from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

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Cabin class types available on flights to Phoenix Sky Harbor Intl Airport

First Class flights from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Business Class flights from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Prem Econ Class flights from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

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IAD - PHX

$149 Find Cheap Southwest Flights from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Search hundreds of travel sites at once for deals on Southwest flights from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Cheap Southwest Flight Deals from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Recent round-trip Southwest flight deals from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Recent one-way Southwest flight deals from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Recent last minute Southwest flight deals from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Recent direct Southwest flight deals from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Good to know

When to Book Flights with Southwest from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

FAQs for flying to Phoenix Sky Harbor Intl Airport with Southwest

Is Southwest the cheapest airline to fly with from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport?

What is the cheapest Southwest flight from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport?

Does Southwest fly direct to Phoenix Sky Harbor Intl Airport from Washington, D.C. Dulles Intl Airport?

What’s the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport with Southwest?

What’s the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport with Southwest?

Southwest Customer Reviews

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Everything you need to know for your flight from Washington, D.C. Dulles Intl Airport to Phoenix Sky Harbor Intl Airport

Cabin class types available on flights to Phoenix Sky Harbor Intl Airport

Cabin classes available on flights to Washington, D.C. Dulles Intl Airport. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Complete your trip to Phoenix Sky Harbor Intl Airport with a hotel stay or car rental

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Find deals for your return flight

Top Southwest flights

The most popular destinations for flights with Southwest according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.