$120 Find Cheap Flights from Philadelphia to Washington - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Washington departing on 8/6. 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

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Washington.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Washington.
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Cheap Flights from Philadelphia to Washington

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seattle
Seattlenonstop$329
Spokane
Spokane1 stop$300
Pasco
Pasco1 stop$399
Bellingham
Bellingham1 stop$439
Pullman
Pullman1 stop$439
Wenatchee
Wenatchee1 stop$448
Seattle
Seattlenonstop$329
Spokane
Spokane1 stop$300
Pasco
Pasco1 stop$399
Bellingham
Bellingham1 stop$439
Pullman
Pullman1 stop$439
Wenatchee
Wenatchee1 stop$448

Book Cheap Philadelphia to Washington Plane Tickets

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

Wed, Jul 22 - Mon, Jul 27
Delta Logo
5:40 am - 11:39 am
PHL
-
GEG
8h 59m
1 stop
Delta Logo
4:30 pm - 5:29 am
GEG
-
PHL
9h 59m
1 stop
$300Delta
Wed, Nov 11 - Wed, Nov 18
Delta Logo
7:05 am - 1:02 pm
PHL
-
GEG
8h 57m
1 stop
Delta Logo
10:45 pm - 9:27 am
GEG
-
PHL
7h 42m
1 stop
$311Delta
Wed, Nov 11 - Tue, Nov 17
United Airlines Logo
11:24 am - 9:05 pm
PHL
-
GEG
12h 41m
2 stops
United Airlines Logo
1:49 pm - 11:46 pm
GEG
-
PHL
6h 57m
1 stop
$316United Airlines
Thu, Sep 10 - Sun, Sep 13
Alaska Airlines Logo
4:48 pm - 11:11 pm
PHL
-
GEG
9h 23m
1 stop
Alaska Airlines Logo
5:12 am - 3:45 pm
GEG
-
PHL
7h 33m
1 stop
$328Alaska Airlines
Sun, Jul 26 - Tue, Aug 4
American Airlines Logo
7:35 pm - 10:56 pm
PHL
-
SEA
6h 21mnonstop
American Airlines Logo
8:20 am - 4:42 pm
SEA
-
PHL
5h 22mnonstop
$330American Airlines
Sun, Jul 26 - Tue, Aug 4
Frontier Logo
8:37 pm - 11:20 am
PHL
-
SEA
17h 43m
1 stop
Frontier Logo
8:13 pm - 6:00 am
SEA
-
PHL
30h 47m
1 stop
$331Frontier
Wed, Nov 11 - Tue, Nov 17
United Airlines Logo
1:22 pm - 9:05 pm
PHL
-
GEG
10h 43m
2 stops
United Airlines Logo
5:00 am - 5:42 pm
GEG
-
PHL
9h 42m
2 stops
$331United Airlines
Wed, Jul 22 - Tue, Jul 28
Frontier Logo
11:06 am - 10:39 am
PHL
-
SEA
26h 33m
1 stop
Frontier Logo
8:13 pm - 12:22 pm
SEA
-
PHL
13h 09m
2 stops
$332Frontier
Wed, Aug 19 - Wed, Aug 26
Alaska Airlines Logo
4:48 pm - 7:34 pm
PHL
-
PDX
5h 46mnonstop
Alaska Airlines Logo
7:30 am - 3:45 pm
PDX
-
PHL
5h 15mnonstop
$357Alaska Airlines
Wed, Jul 15 - Wed, Jul 22
American Airlines Logo
7:05 am - 2:50 pm
PHL
-
PSC
10h 45m
1 stop
American Airlines Logo
3:24 pm - 5:35 am
PSC
-
PHL
11h 11m
1 stop
$457American Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to Washington flights

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

How much is a round-trip flight from Philadelphia to State of Washington?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to State of Washington departing in August.

What is the cheapest Philadelphia to Washington flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Washington from Philadelphia found in the last 5 days was to Seattle, at $329 round-trip. The most popular route is from Philadelphia (PHL) to Seattle (SEA), and the cheapest round-trip airline ticket found on this route in the last 5 days was $329.

What is the cheapest time of day to fly to Washington?

The average price for all round-trip flights from Philadelphia to Washington depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Washington is generally at night, when round-trip flights cost $460 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to Washington is generally in the evening, which is peak travel time and where the average cost of a ticket is $463.

Can I save money by flying with a layover from Philadelphia to Washington?

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.

No, with an average price for the route of $450, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Philadelphia to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Washington, 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 Philadelphia to Washington is January, when tickets cost $139 (return) on average. On the other hand, the most expensive months are September and May, when the average cost of round-trip tickets is $1,078 and $848 respectively.

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

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

If your flying dates are flexible, you should consider flying to Washington on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Philadelphia to Washington. For your return ticket, we recommend flying on a Tuesday and avoiding Sundays for the best deals.

How far in advance should I book a flight from Philadelphia to Washington?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to Washington, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to Washington, you should book around 4 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$120
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Philadelphia to Portland

FAQs - booking Washington flights

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

    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 Philadelphia to Washington.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Philadelphia to Washington 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 Philadelphia to Washington?

    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 from Philadelphia to Washington with an airline and back with another airline.

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

    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 from Philadelphia to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Washington

  • Looking for a cheap flight? 25% of our users found tickets from Philadelphia to the following destinations at these prices or less: Seattle $205 one-way - $357 round-trip

Reviews of the top 5 airlines serving from Philadelphia to Washington

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Washington. 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 Philadelphia to Washington? 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.
7.9
Alaska AirlinesOverall score based on 12580 reviews
7.0Food
7.8Comfort
8.1Boarding
7.0Entertainment
8.5Crew
Airline reviews

I truly can’t give a review regarding the food or entertainment it did not apply to my flight. But everything ran very smoothly.

10.0 ExcellentAnonymous, Apr 2026
PHL - SEA
Read more Alaska Airlines reviews

I truly can’t give a review regarding the food or entertainment it did not apply to my flight. But everything ran very smoothly.

I had the worst seat neighbors thry literally snored so loud and the man next to me man spreaded the whole time i couldnt sleep

Why is a fanny pack considered a third carry on? This shouldn't be regulated at the gate

The crew in first class did an amazing job keeping me comfortable, well fed and with plenty to drink. They work hard and deserve to be recognized

Mid flight we were bothered by a bee. Kind of odd, but a bee allergy made it a bit stressful. Attendants passed by our aisle during service multiple times. Otherwise, it was fine.

The airline said get there three hours before the flight if you do not have the new Real-ID. Except nobody is at the check in desk and i had to stand in line for 30-45 minutes for somebody to start checking in/accepting baggage.

This flight was delayed but otherwise comfortable except for some turbulence. The crew was minimally engaged with us but nothing particularly bad in our interaction. The pilot was incomprehensible mumbling whenever he got on the air - honestly, impossible to understand. However, there were two flights that multiple people were trying to connect to that were leaving in 10 minutes after our flight landed (one to Alaska and one to Oregon). The passengers in the back reported to me that they asked the flight attendents to assist them in getting out first to try to make those flights- they reported that they were told that this would not occur because "people aren't so nice". NOBODY from the flight crew announced that there were people who needed to catch a tight connection and to please let them off first. I was in row 16 and when I heard this, I made an announcement myself and worked to get those trying to make those flights out first. Unfortunately, a lot of people were already in the aisles and these folks were slowed getting out. But what is wrong with the Alaska team that they wouldn't help those passengers???? One of the things I love about flying Alaska is that generally the crews are special people who seem to enjoy their jobs (despite the challenges of working with the public) and try to assist however they can. I would have liked to see the Alaska crew make an announcement to assist getting passengers with a tight connection due to the delayed flight out first. I think that Alaska often stands out because of the niceness of the crews, but this was a fail. Honestly, a huge fail. Please do better next time. I really believe in Alaska and fly preferentially on Alaska, but that means standing out from the crowd to do the right thing in being kind when we can.

I was unfortunately placed in the middle seat. Very, Very cramped.

I have to eat gluten-free due to celiac disease, but so far no Alaska Air flight has offered a gluten-free option for the snack given out with free drinks. It seems like that wouldn't be too hard to do.

It was a great flight and the flight crew was very helpful and professional.

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Connection flights should be spaced out farther because too close I missed my connection.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The gate attendants and the crew were terrible. Because of high winds, they needed to carry more fuel, so they had to get volunteers to take the next flight at 6 am the next day. They did a terrible job of it - our flight ended up taking off just under 3 hours of the scheduled time. I hope to never fly Delta again.

My flight consistently said it was on time and the plane didn’t arrive until after 30 minutes after take off and nothing was announced to passengers

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Smooth and easy boarding, comfortable for the entire 5 hour flight, and the seat back entertainment was great! I appreciated all the features, from location info and maps, movies, the ability to connect with Bluetooth headphones, and good selection of movies. Food was good, normal airline snacks (I didn’t purchase anything)

My husband and I recently had an unfortunate experience with Lufthansa. At the Philadelphia International airport, the ground staff refused to board us because we didn’t have a current visa stamped on our passports for Frankfurt. We completely understand that this was our mistake. we should have double-checked the visa requirements before our trip. However, the issue that upset us most was how the situation was handled by the staff. They told us they would mark it as “boarding denied due to visa issue”, but instead they recorded it as “no show”. Because of that incorrect entry, our return flight was automatically cancelled as well, which caused additional stress and expense. Mistakes can happen, but we expected more transparency and accuracy from a reputed airline like Lufthansa. It would have made a big difference if the staff had been more careful and considerate in documenting the situation correctly.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

leg space better than expected. two washrooms for one plane isn't enough.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

Flight was on time, crew were excellent. For some reason our originally selected seats were changed. We had to re-choose our seats when we checked in online and options were limited. One of our two checked bags we placed on the wrong carousel. It was only be shear luck that I saw it. That cost us 20 minutes of wasted time. So much for the “priority” tags. They are meaningless, and have been ever since they were implemented. I wish you would do the save some money and stop using them.

Everything was fantastic. Modern plane. All the amenities! Although the paid snacks and meals are pure robbery. Like i understand airlines need to make money, but 11$ USD for an overnight oats with some nuts in it and barely any pieces of apple.... Highway robbery

Fine. Nothing to write home about. The plane left on time, and arrived on time.

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

You get what you pay for nothing essentially but a hard uncomfortable seat that doesn’t recline and kids screaming all around you and chaotic boarding and limited check bag weight allowance when compared to other airlines

Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.

Check in at Philadelphia international was absolutely terrible! I fly 2 to 3 times a month and avoid frontier at all cost and will never fly Frontier again! The night before travel, I tried checking in however, the app was giving me an error, so I went to the desktop, which instructed you that you need to use the app. The next day I presented at the check-in gate after trying at least a half dozen times prior to getting into the airport and continuing to getting the error in the app. I actually had rebooted my phone numerous times and reinstall the app just in case. My phone is only one generation older than the current model. It has no problems completing a frontier flight purchase or any other app issues. There was only three frontier employees working at check-in and a huge line while I was in line I continued to try and check in via the app. As I approach the desk, I was dreading dealing with the agent. He was extremely unprofessional, anti-semantic & very ignorant, and mean to the people in front of me, as well as the people who ended up being behind me. He literally told people “Man I don’t care bout y’all” in his native dialect! Maintaining my composure I approached and explained the situation. To which he replied, you’re gonna have to pay then! I don’t understand. It’s an issue with their app not allowing me to check in! Not my issue! He told me if I pay cash it would be $15, $25 if I pay credit card. I don’t understand a $10 difference for paying with a credit card? I am completely cashless so I continued to try using the app to avoid the $25 fee, Which I still don’t believe that I should be responsible for since it was Frontier’s technical issue!!! I continued to check in via the app a couple more times after he verified I was doing everything right he proceeded to continue to belittle the people behind me. Yelling at them saying I don’t care about you people! I cannot believe that this is the way that businesses would treat its customers! Unfortunately, the black mail with dreadlocks did not have a name tag all he had was a frontier sweater on! For the $25 fee that I ended up getting charged on my credit card. I should’ve just booked originally with Spirit or any other carrier! I have no problem paying fees that I should be responsible for, but when it’s due to a technical failure of a company, the customer should not be responsible for it! I cannot believe that it’s not frontier going out of business!

terrible cascading delays and unhelpful customer service. uncomfortable plane. crew was great, however!

Booked direct in July '24. Turned into a 14 hr layover (both ways) in Denver. My 5 day vaca turned into a 1 day . Not good, BUT,... Thank you for the people @ Frontier who were professionally friendly & approachable.

$80 fee for a backpack as a personal item is robbery.

Flying Frontiier was extremely poor!! I paid for a7:15am flight on flight 1601 from PHL To Las Vegas and the delay was brutally, excruciatingly and disgustingly long (8 hrs). I arrived by Uber to PHL at 5:30 am and had to spend the entire 8 hr delay inside the airport. Even more atrocious was that the flight was delayed twice. On the phone with customer service for two hours and was not fully compensated. I feel taken advantage of with this airline. They offered a menial couched for another flight within 90 days to me and my husband who has never flown but this experience has made us almost 100% sure to not fly this airline and will suggest that others don’t either. We don’t want to book ever again, don’t want a menial voucher and I believe by standard and because the flight was delayed for 8 hours, I should be fully reimbursed for the entire round trip. There is no excuse why this should have ever occurred. After sharing my experience with others in Vegas and Philadelphia, I was told that Frontier airlines is notorious for long delayed flights, poor customer service and refusal to compensate people correctly. I’m very nervous to see what departing from Vegas to Philadelphia will bring.

Everything you need to know for your flight from Philadelphia to Washington

Information on your arrival and departure airports