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Find cheap flights from Philadelphia to the United States from $21

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 the United States departing on 4/30. 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
0 bags
sáb 3/30
sáb 4/6

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Best United States Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

New York
New York1 stop$110
Los Angeles
Los Angeles1 stop$109
Orlando
Orlandononstop$52
Las Vegas
Las Vegas1 stop$159
Miami
Miaminonstop$51
Chicago
Chicagononstop$38
San Francisco
San Francisco1 stop$160
Boston
Bostonnonstop$23
Washington, D.C.
Baltimore1 stop$122
Denver
Denver1 stop$88
Fort Lauderdale
Fort Lauderdalenonstop$51
Seattle
Seattle1 stop$165
Atlanta
Atlantanonstop$57
Dallas
Dallas1 stop$83
Tampa
Tampanonstop$38
Honolulu
Honolulu2 stops$526
Houston
Houstonnonstop$73
San Diego
San Diego1 stop$160

Good to know

Low season

September

High season

March

Cheapest flight

$21
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Philadelphia to Fort Lauderdale

FAQs - booking United States flights

  • How does KAYAK find such low prices on flights from Philadelphia to the United States?

    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 the United States.

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

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

    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 the United States with an airline and back to Philadelphia with another airline.

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

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

See more FAQs

Top tips for finding cheap flights to the United States

  • Looking for a cheap flight? 25% of our users found tickets from Philadelphia to the following destinations at these prices or less: Atlanta $95 one-way - $180 round-trip; Orlando $57 one-way - $136 round-trip; Miami $59 one-way - $167 round-trip
  • Morning departure is around 6% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Philadelphia to the United States

Need help choosing which airline to fly with from Philadelphia to the United States? 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 KAYAK reviews.
8.0
DeltaOverall score based on 11818 reviews
81overall
82boarding
79comfort
81entertainment
75food
86crew
Airline reviews

Mario was great. Made a night flight on a small aircraft pleasant and memorable.

Read more about Delta

Mario was great. Made a night flight on a small aircraft pleasant and memorable.

It was great I love flying Delta and have never had a bad experience with them

They were 2 hours late departing with no explanation. I missed my connection, was rebooked not in correct seating that I paid for. Over all of was horrible. I now know why I've not flown Delta since 2018

I love the free wifi and headrest screens. I would consider Delta even more because of this but the seats aren't so great. The snacks aren't very good in my opinion. I bought a Bloody Mary and that was great! So just be comfortable with better snacks and the airline world will be yours.

Crew was not helpful. Other passengers in first class were over served blatantly over intoxicated.

We just spent $6000 on our first trip since pre COVID and we were stranded on the runway of our departing airport for 2 hours and 15 minutes while our layover was only an hour and a half. We were told by the pilot we were next for de-icing and then got bumped by 3 other planes. Pilot went on to say they only had one guy working the de-icing where they usually have at least 2. In Rochester. In the heart of winter. Someone missed a step and should be fired. I'm not done.

Food service was bare-bone. Better bot to have any at all rather than hand out premade coffees and cookies to random few passengers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Crew were exceptional. Plane was quiet and quite empty, so I had a row to sleep across.

Everything would be much better if Kayak stopped nosing into my business with Delta.

Very uncomfortable seats and seat backs, and I am only 5’9”. Delayed due to crew issues, spent a long time with no ventilation. Teeny overhead bins. Wifi worked well. Arrived safely.

Boarding was friendly and quick. While the plane model was older with no live tv, the entertainment was full of movies and tv shows. All food was available. Pilots were very communicative with status of the flight. Flight landed on time.

Amazing comfortable chairs great snacks super friendly staff pilots did excellent job. Smooth sailing all the way. Definitely be flying United more.

Easy boarding in group 2. Landed 1/2 hr early. Delicious cookie snack.

I was delighted that we were able to get on the 4:40 pm flight rather than our original booking at 6:55 pm!! Other than that, the flight was comfortable and landed early😊

Good. The wife was not working but then it got resolved.

Missed this flight due to delays from my previous flight

We waited too long to get water while the plane was on the Tarmac awaiting de-icing.

The flight from Ottawa to Chicago took a lot longer due to DC in Ottawa. We got to Chicago and went to our gate to catch our flight. We only had nine minutes I found that very stressful.

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

Flight from PHL to PHX arrived 50 minutes early and a gate was available. First class flight attendant Stephanie was very friendly and polite. Sanitizing wipes should be provided with meals in addition to refresher towels.

flight delayed so missed connection and this had to rebook for next day

Flight departed PHL one hour late due to late arrival of aircraft. On board services were okay. First class menu does not offer any new items; same desserts (cheese & crackers or Mango sorbet). At least there were no credit card promotions during the flight.

After sitting on plane for 7+ hours, flight was canceled. And to makes matters worse, my suitcase is in baggage hell!

Terrible Ticketing and Check in process. I learned that AA unilaterally cancelled my premium seating from PHL to CLT and from CLT to JAN. They did, however, refund my money, but my seating was subsequently severely downgraded. They didn’t have a seat for my unless I paid for it! Not cool! Consequently, Check-in took 45 min. AA is usually great, but this was my worst experience with AA ever. Appalling they they arbitrarily cancel my seats threatening loss of flight if I didn’t pay for a seat!!!! -John

We liked quick boarding and on time departure. Seats were very uncomfortable.

Great flight. Quick boarding and departure. No problems. Flight crew were very friendly and professional.

heat was on full blast. It was like the Tropics inside the plan.

We had a humorous and kind flight attendant, boarding was efficient, flight smooth, pilot gave updates and was humorous too, two drink services was very helpful. In flight entertainment is always appreciated

If they could pack the seats closer together they would...

Check in easy, price very good, no frills flying tho! Pay for Every item once seat is paid for so do the math with baggage fees and carry on fees.

I was penalized for a mistake made by your team

comfortable flight. not fond of the idea to pay for every little detail. baggage checkin or carry ons, basic snack, or some sort of basic entertainment/wifi. would be nice to offer these as perks and stop with the penny pinching.

They changed our gate 30 minutes before boarding began. We noticed about 20 people missed their flight due to doors closing early.

It would have been no e to have the option of a mid day flight and not super early or super late in the day.

Flight was delayed 2+ hours missed a concert because of it…

Smooth flight flight attendants were extremely helpful kind friendly. I had Glenn he was by far the most outgoing

Flight was late taking off. I think the crew and pilots did a good job. It definitely worked for me. I would fly spirit again thank you.

Never made it to Atlanta due to the horrible policy of having to be at the gate 1 hour prior to departure. I was at the airport and the plane had not left Baltimore, but was not allowed to board.

Was not able to board the flight due to a horrible policy that I needed to be at the gate 1 hour before departure. I lost money on this and the connecting flight due to having to book on another airline. I was flying to Florida for my mother's cancer surgery in the afternoon.

Our flight was on time and unremarkable which I'm grateful for, as it is not the norm traveling these days. Frontier is a low-cost carrier and it really shows when compared to other "normal" carriers. They don't even give you water during the flight. The coach seats are decent, however it was not as clean as it should be. We had crumbs all over the floor by our seats.

Flying frontier reminded me of flying with my family in the 80’s in all of the worst ways possible. From poor customer service to little to no technology. The plane was dirty old and also stuck in the 80’s. From their seatbelts to not having anywhere to charge our phones the seats and the equipment I wasn’t sure if I was being punked or thrown back in time. Needless to say I don’t see myself flying frontier ever again.

4 hour delay because they used our aircraft to fly a different segment (per the captain)

Lost baggage on my connecting flight. 24 hours later, still no update on my bags.

They lost my baggage on my connection flight, it’s been 24 hours since I put my claim in and still no update on my bags.

As per ultra-low-cost-carrier model, you must adjust to a minimalist approach (or, pay-as-you-go mentality) when evaluating Frontier. That said, here's the pro/con of this trip. PROs Pricing. Incredibly cheap: $30 roundtrip(!!) PDX-PHX. Hard to complain. Schedule: Direct both ways. Pilot made up time and we got in 15-20 mins early each way. Aircraft. Frontier flies Airbus metal, and the aircraft are pretty new. Seating. Airline status-match got me upgraded 'Stretch' seating (their premium economy). *Excellent* legroom. The leather trimmed seats were adequately comfortable. Some of these upgraded seats have recline (this flight did not), and larger tray tables. Compared to standard Frontier economy, which has very tight seating, and ridiculously small tray tables, it was quite nice. Aircrew: The flight attendants on both legs were top tier. Experience, confidence, and customer service skills exceeded what I have seen on the legacy carriers. This is not always true with Frontier, but this team was exemplary. Food-for-sale. Frontier offers no complimentary snacks/bevs except ice water. Purchased a cheese pack and it was adequate and about as expensive as you'd see on a legacy carrier. CONs No power at seats. True on all Frontier flights, but a bummer nonetheless. Bring a battery. No inflight entertainment. Load your own offline before flying. No wifi available. Honestly, with Frontier's upsell model, it still surprises me they don't equip their planes for this and use it as a revenue stream. Heck, for a $30 rt flight, I'd probably have paid $10-15 each way for wifi + movies. Overall, you know going in about the CONs of the carrier model, so really the complaints are minor. I had a day trip to Phoenix for a $30 flight. Great value.

I had to cancel within 1hour of the reservation an they put you through hell to . no live customer service desk. I'm handy caped and they make it almost impossible to cancel. They are steeling my money. You should not have that airline on your site. Contact me and I will give you all info. Of what the are doing to me just notable treatment they are set up like that to take people

The flight was delayed and I had to cancel because I would have missed my connection and there were no other flights for the next two days. They also lost my bag!!

They didn’t bother to restock the plane before we left, so most items on the menu were not available.

they charge too much when you arrive in the air port

Book cheap flights from Philadelphia to the United States

Recent round-trip flight deals

3/13qua
nonstopFrontier
1h 31mPHL-BOS
3/19ter
nonstopFrontier
1h 41mBOS-PHL
$28
4/16ter
nonstopFrontier
2h 59mPHL-TPA
4/17qua
nonstopFrontier
2h 40mTPA-PHL
$38
4/23ter
nonstopSpirit Airlines
2h 54mPHL-MIA
5/8qua
nonstopSpirit Airlines
2h 54mMIA-PHL
$51
4/22seg
nonstopSpirit Airlines
2h 57mPHL-FLL
4/24qua
nonstopSpirit Airlines
2h 50mFLL-PHL
$51
4/10qua
nonstopUnited Airlines
2h 25mPHL-ORD
4/16ter
nonstopUnited Airlines
2h 06mORD-PHL
$91
5/15qua
nonstopAmerican Airlines
2h 24mPHL-ORD
5/18sáb
nonstopAmerican Airlines
2h 07mORD-PHL
$94
4/11qui
nonstopUnited Airlines
2h 25mPHL-ORD
4/15seg
nonstopUnited Airlines
2h 03mORD-PHL
$97
4/23ter
nonstopAmerican Airlines
4h 16mPHL-DEN
5/1qua
nonstopAmerican Airlines
3h 33mDEN-PHL
$133
7/11qui
nonstopDelta
1h 41mPHL-BOS
7/16ter
nonstopDelta
1h 44mBOS-PHL
$207
3/27qua
1 stopDelta
4h 32mPHL-ORD
4/3qua
1 stopDelta
3h 36mORD-PHL
$230

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Recent one-way flight deals

4/30ter
nonstopSpirit Airlines
2h 56mPHL-FLL
$21
3/6qua
nonstopFrontier
1h 22mPHL-BOS
$21
4/17qua
nonstopFrontier
1h 21mPHL-BOS
$24
4/3qua
nonstopSpirit Airlines
2h 56mPHL-FLL
$24
4/10qua
nonstopAmerican Airlines
2h 25mPHL-ORD
$46
5/4sáb
nonstopAmerican Airlines
2h 26mPHL-ORD
$49
4/28dom
nonstopUnited Airlines
2h 25mPHL-ORD
$56
4/5sex
nonstopUnited Airlines
2h 25mPHL-ORD
$75
3/28qui
1 stopDelta
4h 31mPHL-ORD
$147
4/2ter
1 stopDelta
7h 55mPHL-LAX
$171

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Last minute flights from Philadelphia to the United States

Last minute flight, train and bus deals

3/4seg
nonstopFrontier
1h 22mPHL-BOS
3/6qua
nonstopFrontier
1h 36mBOS-PHL
$58
3/5ter
nonstopSpirit Airlines
2h 54mPHL-FLL
3/6qua
nonstopSpirit Airlines
2h 46mFLL-PHL
$63
3/5ter
nonstopFrontier
2h 51mPHL-MCO
3/5ter
nonstopFrontier
2h 29mMCO-PHL
$68
3/5ter
nonstopSpirit Airlines
2h 54mPHL-FLL
3/7qui
nonstopSpirit Airlines
2h 46mFLL-PHL
$72
3/5ter
multi-stopAmerican Airlines
5h 08mPHL-BOS
3/6qua
nonstopAmerican Airlines
1h 46mBOS-PHL
$186
3/5ter
multi-stopAmerican Airlines
5h 53mPHL-BOS
3/6qua
multi-stopAmerican Airlines
7h 51mBOS-PHL
$194
3/5ter
multi-stopUnited Airlines
4h 25mPHL-BOS
3/6qua
multi-stopUnited Airlines
5h 08mBOS-PHL
$366
3/1sex
multi-stopUnited Airlines
6h 10mPHL-ORD
3/6qua
nonstopUnited Airlines
1h 58mORD-PHL
$376
3/2sáb
multi-stopDelta
7h 40mPHL-LAS
3/4seg
multi-stopDelta
7h 09mLAS-PHL
$397
3/1sex
multi-stopDelta
5h 32mPHL-ORD
3/3dom
multi-stopDelta
4h 03mORD-PHL
$444

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Philadelphia - United States Flights

Departure:

Philadelphia (PHL)United States

Return flight deals:

United States - Philadelphia

Cabin classes:

$298
$559
$463
$34

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