IAD - PHL

$81 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 6/17. 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, 0 bags

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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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$141
Typical prices: $387-$218
Multiple Airlines
Wed 5/27Wed 6/3
IAD - PHL • 1 stop
Cheapest non-stop
$239
Typical prices: $289-$239
United Airlines
Fri 5/29Sun 5/31
IAD - PHL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
For a quick departure from IAD, use the AeroTrain.
Use the SEPTA Airport Line for a 30-minute ride to downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $156 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Every day
You can fly direct with United Airlines. Average duration is 1h 14m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Atlanta (ATL)
Cheapest • Avg $184 (round-trip)
Charlotte (CLT)
Shortest trip • 4h 09m (one-way)
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 54% price drop
February
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Philadelphia!
Flight Deals
Booking Insights
Expert advice
Flight 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

Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
6:22 pm - 9:25 am
IAD
-
PHL
15h 03m
1 stop
Multiple Airlines Logo
8:10 am - 6:42 pm
PHL
-
IAD
10h 32m
1 stop
$141Multiple Airlines
Wed, Jun 17 - Wed, Jun 24
Frontier Logo
6:26 pm - 12:44 am
IAD
-
PHL
30h 18m
1 stop
Frontier Logo
6:00 am - 8:02 pm
PHL
-
IAD
14h 02m
1 stop
$156Frontier
Tue, May 26 - Tue, Jun 2
Frontier Logo
5:30 pm - 3:02 pm
IAD
-
PHL
21h 32m
1 stop
Frontier Logo
8:10 am - 6:42 pm
PHL
-
IAD
10h 32m
1 stop
$158Frontier
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
6:22 pm - 9:25 am
IAD
-
PHL
15h 03m
1 stop
Multiple Airlines Logo
8:43 pm - 4:21 pm
PHL
-
IAD
19h 38m
2 stops
$172Multiple Airlines
Wed, Jun 17 - Tue, Jun 23
Frontier Logo
6:26 pm - 12:44 am
IAD
-
PHL
30h 18m
1 stop
Frontier Logo
8:00 am - 8:02 pm
PHL
-
IAD
12h 02m
1 stop
$173Frontier
Mon, Jun 8 - Thu, Jun 11
Multiple Airlines Logo
11:07 am - 11:45 pm
IAD
-
PHL
12h 38m
2 stops
Multiple Airlines Logo
8:44 pm - 8:02 pm
PHL
-
IAD
23h 18m
1 stop
$185Multiple Airlines
Mon, Jun 8 - Thu, Jun 11
Multiple Airlines Logo
11:07 am - 11:45 pm
IAD
-
PHL
12h 38m
2 stops
Multiple Airlines Logo
6:27 pm - 2:16 pm
PHL
-
IAD
19h 49m
1 stop
$186Multiple Airlines
Mon, Jun 8 - Thu, Jun 11
Multiple Airlines Logo
7:27 pm - 8:51 am
IAD
-
PHL
13h 24m
1 stop
Multiple Airlines Logo
8:44 pm - 8:02 pm
PHL
-
IAD
23h 18m
1 stop
$196Multiple Airlines
Mon, Jun 8 - Thu, Jun 11
Multiple Airlines Logo
7:27 pm - 8:51 am
IAD
-
PHL
13h 24m
1 stop
Multiple Airlines Logo
6:27 pm - 2:16 pm
PHL
-
IAD
19h 49m
1 stop
$197Multiple Airlines
Tue, May 26 - Tue, Jun 2
Frontier Logo
5:30 pm - 3:02 pm
IAD
-
PHL
21h 32m
1 stop
Frontier Logo
12:21 pm - 11:09 pm
PHL
-
IAD
10h 48m
2 stops
$202Frontier
Booking Insights

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.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Philadelphia?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to Philadelphia departing in May.

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 Tuesday, as it's usually the priciest day. When flying back from Philadelphia, Wednesday is the cheapest day to fly and Saturday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Philadelphia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Philadelphia is November, where tickets cost $184 (return) on average. On the other hand, the most expensive months are August and March, where the average cost of round-trip tickets is $590 and $570 respectively.

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 $308 on average.

Find deals
Expert advice

Expert advice for your flight from Dulles Intl to Philadelphia

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on PHL

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 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

Good to know

Low seasonJanuary
Cheapest flight$81
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 22% 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 $81 for a one-way ticket and $141 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?

    American Airlines, Iberia, and Finnair offer 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 Canadair (Bombardier) Regional Jet CRJ-550 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 $398 or less one-way and $467 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to Philadelphia?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. Dulles Intl 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

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Philadelphia to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the 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 9680 reviews
8.1Crew
6.6Food
7.1Entertainment
7.3Comfort
7.7Boarding
Airline reviews

Vegetarian selection could be better. Bread was too hard to chew.

8.0 ExcellentAnonymous, Apr 2026
IAD - FRA
Read more United Airlines reviews

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

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

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Philadelphia (PHL)