TYS - PHL

$38 Find Cheap Flights from Knoxville 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 Knoxville to Philadelphia departing on 9/11. 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 Knoxville 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 Knoxville to Philadelphia, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$59
Typical prices: $533-$299
Allegiant Air
Thu 7/30Fri 8/28
TYS - PHL • Non-stop
Cheapest one-way
$38
Typical prices: $439-$640
Allegiant Air
Fri 9/11
TYS - PHL • Non-stop
Nonstop flights
You can fly direct with American Airlines and Allegiant Air. Average duration is 1h 57m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $248 (round-trip)
Shortest trip • 4h 25m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 17% price drop
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 Knoxville to Philadelphia (TYS-PHL)

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

Thu, Jul 30 - Fri, Aug 28
Allegiant Air Logo
3:38 pm - 5:28 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
4:35 pm - 6:35 pm
PHL
-
TYS
2h 00mnonstop
$59Allegiant Air
Thu, Jul 30 - Sun, Aug 2
Allegiant Air Logo
3:38 pm - 5:28 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
6:18 pm - 8:21 pm
PHL
-
TYS
2h 03mnonstop
$78Allegiant Air
Thu, Jul 9 - Thu, Jul 16
Allegiant Air Logo
3:44 pm - 5:34 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
6:18 pm - 8:21 pm
PHL
-
TYS
2h 03mnonstop
$79Allegiant Air
Thu, Jul 9 - Thu, Jul 16
Allegiant Air Logo
3:44 pm - 5:34 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
6:18 pm - 8:21 pm
PHL
-
TYS
2h 03mnonstop
$81Allegiant Air
Sun, Jul 12 - Thu, Jul 16
Allegiant Air Logo
3:47 pm - 5:37 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
6:18 pm - 8:21 pm
PHL
-
TYS
2h 03mnonstop
$82Allegiant Air
Sun, Jul 12 - Thu, Jul 16
Allegiant Air Logo
3:47 pm - 5:37 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
6:18 pm - 8:21 pm
PHL
-
TYS
2h 03mnonstop
$86Allegiant Air
Mon, Sep 14 - Mon, Sep 21
Allegiant Air Logo
2:54 pm - 4:44 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
5:34 pm - 7:34 pm
PHL
-
TYS
2h 00mnonstop
$98Allegiant Air
Fri, Sep 4 - Mon, Sep 7
Allegiant Air Logo
10:52 am - 12:42 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
11:40 am - 1:40 pm
PHL
-
TYS
2h 00mnonstop
$110Allegiant Air
Fri, Sep 18 - Mon, Sep 21
Allegiant Air Logo
1:54 pm - 3:44 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
5:34 pm - 7:34 pm
PHL
-
TYS
2h 00mnonstop
$111Allegiant Air
Sun, Jul 12 - Sun, Jul 19
Allegiant Air Logo
3:47 pm - 5:37 pm
TYS
-
PHL
1h 50mnonstop
Allegiant Air Logo
6:18 pm - 8:21 pm
PHL
-
TYS
2h 03mnonstop
$122Allegiant Air
Booking Insights

KAYAK's insights & trends for Knoxville to Philadelphia flights

Get data-powered insights and trends into flights from Knoxville 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 Knoxville 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 Knoxville to Philadelphia departing in July.

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville 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 Knoxville to Philadelphia is September, where tickets cost $393 (return) on average. On the other hand, the most expensive months are April and November, where the average cost of round-trip tickets is $585 and $554 respectively.

Can I save money by flying with a layover from Knoxville 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.

No, with an average price for the route of $156, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Knoxville to Philadelphia, 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 Knoxville to Philadelphia, you should book around 5 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Expert advice

Expert advice for your flight from Knoxville 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
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

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.

Good to know

Low seasonJanuary
Cheapest flight$38
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Knoxville to Philadelphia

When to book flights from Knoxville to Philadelphia

Are your dates flexible? Find out the best times to travel from Knoxville 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 flights from Knoxville to Philadelphia

  • What is the cheapest flight from Knoxville to Philadelphia?

    In the last 5 days, the lowest price for a flight from Knoxville to Philadelphia was $38 for a one-way ticket and $59 for a round-trip.

  • Do I need a passport to fly between Knoxville and Philadelphia?

    A passport is not required to fly from Knoxville to Philadelphia.

  • Which airlines offer Wi-Fi service onboard planes from Knoxville to Philadelphia?

    American Airlines, Delta, and JetBlue offer inflight Wi-Fi service on the Knoxville to Philadelphia flight route.

  • Which aircraft models fly most regularly from Knoxville to Philadelphia?

    The Embraer ERJ-145 is the aircraft model that flies most regularly on the Knoxville to Philadelphia flight route.

  • Which airline alliances offer flights from Knoxville to Philadelphia?

    oneworld is the only airline alliance operating flights between Knoxville and Philadelphia.

  • On which days can I fly direct from Knoxville to Philadelphia?

    There are nonstop flights from Knoxville to Philadelphia on a daily basis.

  • Which is the best airline for flights from Knoxville to Philadelphia, Allegiant Air or American Airlines?

    The two airlines most popular with KAYAK users for flights from Knoxville to Philadelphia are Allegiant Air and American Airlines. With an average price for the route of $112 and an overall rating of 7.3, Allegiant Air is the most popular choice. American Airlines is also a great choice for the route, with an average price of $504 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Knoxville 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 Knoxville to Philadelphia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Knoxville 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 Knoxville 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 Knoxville with another airline. Booking your flights between Knoxville 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 Knoxville 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 Knoxville 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 Knoxville to Philadelphia

  • Looking for a cheap flight? 25% of our users found flights on this route for $77 or less one-way and $347 or less round-trip.

Prefer to fly direct from Knoxville to Philadelphia?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Knoxville McGhee Tyson to Philadelphia.
Find which airlines fly direct from Knoxville McGhee Tyson Airport to Philadelphia Airport, which days they fly and book direct flights.

Direct departures

Knoxville McGhee Tyson to Philadelphia

Monday

American Airlines,Allegiant Air

American Airlines,Allegiant Air

Tuesday

American Airlines

American Airlines

Wednesday

American Airlines

American Airlines

Thursday

Allegiant Air,American Airlines

Allegiant Air,American Airlines

Friday

American Airlines,Allegiant Air

American Airlines,Allegiant Air

Saturday

American Airlines

American Airlines

Sunday

Allegiant Air,American Airlines

Allegiant Air,American Airlines

See more direct flights

Direct returns

Philadelphia to Knoxville McGhee Tyson

Monday

American Airlines,Allegiant Air

American Airlines,Allegiant Air

Tuesday

American Airlines

American Airlines

Wednesday

American Airlines

American Airlines

Thursday

Allegiant Air,American Airlines

Allegiant Air,American Airlines

Friday

American Airlines,Allegiant Air

American Airlines,Allegiant Air

Saturday

American Airlines

American Airlines

Sunday

Allegiant Air,American Airlines

Allegiant Air,American Airlines

See more direct flights

Reviews of the top airlines flying from Knoxville to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying from Knoxville 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 Knoxville 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.
7.3
Allegiant AirOverall score based on 694 reviews
5.8Food
7.6Boarding
8.1Crew
6.9Comfort
5.4Entertainment
Airline reviews

Seats were very uncomfortable and being charged for snacks and water.........

4.0 OkayDennis, May 2026
ICT - LAS
Read more Allegiant Air reviews

Seats were very uncomfortable and being charged for snacks and water.........

Allegiant actually impressed me, original inbound flight from PBG was so late they gave us a bird inbound from Des Moines and only left 1h late and gained 40 minutes back in the air. Comfortable flight with no frills but no complaints.

Flight was delayed. Crew was good but hot coffee was not available.

Great. No choice for n/a. No food or entertainment options

No food is available without purchasing it and there is no in-flight entertainment. Both of these are OK because we got an inexpensive flight from Allegiant and, otherwise, our experience was excellent.

just had water and there was plenty of leg & seat room. But then i don't weight 220#s!!

Not totally their fault- screaming kids that had zero parent intervention.

It was cold on the flight. The crew was very pleasant. I didn't order any food. We were delayed due to Captain waiting on maintenance log. He kept us informed though. The flight itself was smooth. I would definitely fly with Allegiant again!

I had a fantastic experience with Allegiant. I had wheelchair assistance and they helped me find my luggage and brought me to my car. Even loaded my luggage. Wonderful service!! Thank you Allegiant!

Superb. Staff great. Great flight. As with other airlines, seating too tight and restrictive.

The seats. The seat in front of me was awful and when the guy sat down, it flew back and hit my head when I was putting my backpack under the seat, It didn't make for a pleasant experience,

Cancelled flight. Still waiting to get home for grand daughter’s graduation .

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

As we approached Denver, we encountered quite a bit of turbulence. I know this can sometimes be the case as I frequently fly this route but not on American. My gripe: Usually a pilot or co-pilot alerts passengers to the possibility of turbulance ahead of time. This did not occur nor did he communiucate during what was a pretty rough ride.

When I booked my flight a month ago - I selected a seat. That seat was NOT the one I ended up with when I checked into my flight the day before. This is the second time this has occurred. So, I checked my next flight on Wednesday and Thursday and no seat was assigned. Poor, very poor customer service.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I didn't end up taking this flight. I got up at 4am for a flight that was supposed to board at 6am - at 5:55am you delayed the flight to 10am. The airport is under construction so I switched to a later flight as I wasn't going to sit in the airport for 4 hours. They said the delay was due to the crew needing rest from a flight coming in late the night before - if that was the case then I think you should have delayed the flight much sooner so that passengers wouldn't get up so early and get to the airport to sit and wait.

I very rarely fly American and my experience today reenforces that is the correct decision. While the staff were all very courteous, our flight was first thing in the morning so there was no reason to be delayed, yet appropriate maintenance checks weren’t completed prior to our flight so we were delayed multiple times. Not a great showing, American Airlines.

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

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

Information on your arrival and departure airports