IAD - PHL

$134 Find Cheap Flights from Washington Dulles Airport to Philadelphia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Philadelphia departing on 6/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Philadelphia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Philadelphia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Philadelphia, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Dulles Intl to Philadelphia (IAD-PHL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Philadelphia 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.

Recent round-trip flight deals from Dulles Intl to Philadelphia

Thu, Jul 3 - Sun, Jul 6
United Airlines Logo
8:45 am - 9:55 amIAD-PHL
1h 10mnonstop
United Airlines Logo
6:05 am - 7:15 amPHL-IAD
1h 10mnonstop
$179United Airlines
Find Deal
Thu, Jul 3 - Mon, Jul 7
United Airlines Logo
8:45 am - 9:55 amIAD-PHL
1h 10mnonstop
United Airlines Logo
6:05 am - 7:15 amPHL-IAD
1h 10mnonstop
$231United Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 22
United Airlines Logo
12:52 pm - 2:06 pmIAD-PHL
1h 14mnonstop
United Airlines Logo
7:58 pm - 9:05 pmPHL-IAD
1h 07mnonstop
$233United Airlines
Find Deal
Thu, Sep 18 - Sat, Sep 27
Frontier Logo
6:00 am - 11:02 amIAD-PHL
5h 02m1 stop
Frontier Logo
6:30 pm - 11:55 pmPHL-IAD
5h 25m1 stop
$251Frontier
Find Deal
Fri, Aug 22 - Sat, Aug 23
Frontier Logo
5:37 pm - 12:49 amIAD-PHL
7h 12m1 stop
Frontier Logo
6:25 pm - 11:58 pmPHL-IAD
5h 33m1 stop
$252Frontier
Find Deal
Sat, Sep 20 - Sat, Sep 27
American Airlines Logo
7:17 pm - 11:17 pmIAD-PHL
4h 00m1 stop
American Airlines Logo
6:02 am - 10:07 amPHL-IAD
4h 05m1 stop
$288American Airlines
Find Deal
Mon, Jun 30 - Mon, Sep 1
American Airlines Logo
6:55 am - 10:38 amIAD-PHL
3h 43m1 stop
American Airlines Logo
8:30 am - 12:37 pmPHL-IAD
4h 07m1 stop
$289American Airlines
Find Deal
Thu, Jul 3 - Mon, Jul 7
 Logo
11:58 am - 9:47 amIAD-PHL
21h 49m2 stops
 Logo
12:06 pm - 12:13 pmPHL-IAD
24h 07m1 stop
Thu, Jul 3 - Mon, Jul 7
 Logo
11:58 am - 9:47 amIAD-PHL
21h 49m2 stops
 Logo
7:05 am - 12:13 pmPHL-IAD
29h 08m2 stops
Tue, Sep 23 - Fri, Oct 24
Delta Logo
6:00 am - 2:59 pmIAD-PHL
8h 59m1 stop
Delta Logo
7:20 pm - 1:57 pmPHL-IAD
18h 37m1 stop
$402Delta
Find Deal
Expert advice

Expert advice for your flight from Dulles Intl to Philadelphia

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
IAD

For a quick departure from IAD, use the AeroTrain for fast access between terminals, especially during busy hours.

Read more about IADby Stefanie Waldek
PHL

Use the SEPTA Airport Line for a cost-effective 30-minute ride to downtown Philadelphia from PHL.

Read more about PHLby Harriet Baskas
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on PHL

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Useful Info

KAYAK's insights & trends for Dulles Intl to Philadelphia flights

Get data-powered insights and trends into flights from Dulles Intl to Philadelphia to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Philadelphia?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Philadelphia clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Washington Dulles Airport to Philadelphia, look for departures on Fridays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Philadelphia, Wednesday is the cheapest day to fly and Tuesday is the most expensive.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to Philadelphia?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $401 on average.

Good to know

Low seasonFebruary
High seasonSeptember
Cheapest flight$134
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from Washington Dulles Airport to Philadelphia

When to book flights from Dulles Intl to Philadelphia

Are your dates flexible? Find out the best times to travel from Dulles Intl to Philadelphia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Philadelphia flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Philadelphia?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Philadelphia was $134 for a one-way ticket and $179 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Philadelphia?

    No, a passport isn't needed to fly from Washington Dulles Airport to Philadelphia. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Washington Dulles Airport to Philadelphia?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Philadelphia, also known as Philadelphia.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to Philadelphia?

    Only American Airlines offers inflight Wi-Fi service on the Washington Dulles Airport to Philadelphia flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Philadelphia?

    The Boeing 767-400 is the aircraft model that flies most regularly on the Washington Dulles Airport to Philadelphia flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to Philadelphia?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Philadelphia.

  • On which days can I fly direct from Washington Dulles Airport to Philadelphia?

    There are nonstop flights from Washington Dulles Airport to Philadelphia on a daily basis.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Philadelphia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Philadelphia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Philadelphia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Philadelphia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Philadelphia with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and PHL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Philadelphia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Philadelphia from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Philadelphia

  • Looking for a cheap flight? 25% of our users found flights on this route for $530 or less one-way and $701 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to Philadelphia?

Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to Philadelphia Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to Philadelphia

Monday

ANA, Air Canada, Avianca, +3 more

ANA, Air Canada, +4 more

Tuesday

ANA, Air Canada, Air China, +4 more

ANA, Air Canada, +5 more

Wednesday

ANA, Air Canada, Avianca, +3 more

ANA, Air Canada, +4 more

Thursday

ANA, Air Canada, Avianca, +3 more

ANA, Air Canada, +4 more

Friday

ANA, Air Canada, Air China, +4 more

ANA, Air Canada, +5 more

Saturday

ANA, Air Canada, Avianca, +4 more

ANA, Air Canada, +5 more

Sunday

ANA, Air Canada, Avianca, +3 more

ANA, Air Canada, +4 more

See more direct flights

Direct returns

Philadelphia to Washington, D.C. Dulles Intl

Monday

ANA, Avianca, Copa Airlines, +2 more

ANA, Avianca, +3 more

Tuesday

ANA, Air China, Avianca, +3 more

ANA, Air China, +4 more

Wednesday

ANA, Avianca, Copa Airlines, +2 more

ANA, Avianca, +3 more

Thursday

ANA, Avianca, Copa Airlines, +2 more

ANA, Avianca, +3 more

Friday

ANA, Air China, Avianca, +3 more

ANA, Air China, +4 more

Saturday

ANA, Air Canada, Avianca, +3 more

ANA, Air Canada, +4 more

Sunday

ANA, Avianca, Copa Airlines, +2 more

ANA, Avianca, +3 more

See more direct flights
See more direct flights

Top airline flying from Dulles Intl to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Philadelphia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Philadelphia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8790 reviews
6.6Food
7.0Entertainment
7.7Boarding
7.3Comfort
8.1Crew
Airline reviews

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

6.0 GoodDorothy, May 2025IAD - CDG
Read more United Airlines reviews

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Flight was cramped with every seat taken. The food was fine, nothing crazy to write home about. The plane felt dated and needing some TLC, the button for the window shade didn't work and there were no AC outlets to use. When communicating with staff all except one nice lady never seemed happy to help me almost like I was bothering them when asked for things like a glass of water or a snack. The flight was overall fine. It did what was needed which is get me from point A to point B. But it certainly was not special. I don't expect much in economy but I believe economy on a host of other airlines is more memorable and better experience.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

Liked nothing. As per previous segment it was delay delay delay.

I completely missed my flight because the first leg was longer than planned. I had to sleep overnight in the airport because no accommodation was provided and then sent to Trinidad in the morning with an anticipated 7 hour layover before my flight to Georgetown which was now with Caribbean Airlines. I tried twice with customer service to see if they could put me on an earlier flight which had seats available but was told it wasn’t possible.

First class felt like economy, seats were horrible, food was horrible, staff inattentive

EVen warmer in the plane it think it was 24+ degrees

Everything you need to know for your flight from Dulles Intl to Philadelphia

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