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$36+ Cheap flights from Knoxville to Philadelphia (TYS - PHL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PHL
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to Philadelphia are usually found in June or July, booked 37 days in advance, depart on a Thursday or Friday and return on a Thursday

Cheap flight deals from Knoxville to Philadelphia

Cheapest flights from Knoxville to Philadelphia
Explore the most affordable flight options available from Knoxville to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:54 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Mon 9/145:34 pm
PHL
-
TYS
Nonstop2h 00m
Allegiant Air
Deal found 7/27$61
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/281:55 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Mon 8/314:05 pm
PHL
-
TYS
Nonstop2h 00m
Allegiant Air
Deal found 7/27$74
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:54 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Mon 9/215:34 pm
PHL
-
TYS
Nonstop2h 00m
Allegiant Air
Deal found 7/25$77
This FlightHub deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:54 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Mon 9/215:34 pm
PHL
-
TYS
Nonstop2h 00m
Allegiant Air
Deal found 7/28$81
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/241:55 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Fri 8/284:35 pm
PHL
-
TYS
Nonstop2h 00m
Allegiant Air
Deal found 7/28$85
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/211:55 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Fri 8/284:35 pm
PHL
-
TYS
Nonstop2h 00m
Allegiant Air
Deal found 7/24$94
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/132:56 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Fri 8/214:35 pm
PHL
-
TYS
Nonstop2h 00m
Allegiant Air
Deal found 7/24$95
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/132:56 pm
TYS
-
PHL
Nonstop1h 50m
Allegiant Air
Sun 8/165:36 pm
PHL
-
TYS
Nonstop2h 03m
Allegiant Air
Deal found 7/24$103

Find flight deals from Knoxville to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$61
(Kiwi.com)

One-way from

$36
(Kiwi.com)

Popular in

April

Cheapest in

June

Average price

$355

Good round-trip deal

$445 or less

Good one-way deal

$69 or less
Provider with most accurate pricing for Knoxville McGhee Tyson-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Philadelphia flights.
Search Deals
From Knoxville McGhee Tyson to Philadelphia
Search Deals
One-way flight from Knoxville McGhee Tyson to Philadelphia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Knoxville McGhee Tyson to Philadelphia.
Search Deals
Price to beat on a one-way flight from Knoxville McGhee Tyson to Philadelphia.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Philadelphia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2026.
Use the filters below to find and compare flights from Knoxville to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Fri 9/11

1:54 pm-3:44 pm

Nonstop1h 50m

Philadelphia

Mon 9/14

5:34 pm-7:34 pm

Nonstop2h 00m

$78

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Fri 10/30

12:57 pm-2:47 pm

Nonstop1h 50m

Philadelphia

Sat 10/31

5:28 pm-10:44 am

2 stops17h 16m

$162

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Fri 10/30

12:57 pm-2:47 pm

Nonstop1h 50m

Philadelphia

Sun 11/1

5:28 pm-9:44 pm

2 stops28h 16m

$169

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Tue 8/25

5:30 pm-9:45 pm

1 stop4h 15m

Philadelphia

Mon 8/31

5:55 am-12:20 pm

1 stop6h 25m

$287

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Tue 8/25

8:05 am-4:00 pm

2 stops7h 55m

Philadelphia

Tue 9/1

7:15 am-12:05 pm

1 stop4h 50m

$292

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Wed 8/26

8:05 am-6:00 pm

2 stops9h 55m

Philadelphia

Tue 9/1

7:15 am-12:05 pm

1 stop4h 50m

$292

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Fri 9/25

2:05 pm-10:05 pm

2 stops8h 00m

Philadelphia

Mon 9/28

5:55 am-5:10 pm

2 stops11h 15m

$331

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Fri 9/4

1:00 pm-10:05 pm

2 stops9h 05m

Philadelphia

Sun 9/6

7:00 am-1:50 pm

1 stop6h 50m

$333

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Fri 8/21

1:00 pm-10:00 pm

2 stops9h 00m

Philadelphia

Mon 8/24

5:55 am-5:10 pm

2 stops11h 15m

$353

KnoxvillePhiladelphia

TYS - PHL

TYSPHL

Knoxville McGhee Tyson

Fri 9/11

5:45 pm-10:05 pm

1 stop4h 20m

Philadelphia

Mon 9/14

5:55 am-12:20 pm

1 stop6h 25m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Knoxville to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Philadelphia in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

To ensure you get the cheapest price possible for a flight from Knoxville to Philadelphia, you should look to book at least 36 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Knoxville to Philadelphia?

Currently, June is the cheapest month in which you can book a flight from Knoxville to Philadelphia (average of $337). Flying from Knoxville to Philadelphia in April is currently the most expensive (average of $585). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from TYS to PHL?

Find hourly flight availability from Knoxville to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2026.

It’s optimal to fly from Knoxville to Philadelphia in the evening. By choosing this option you can save up to 51% on the cost of your flight, compared to a flight at noon.

How much does it cost to fly round-trip from Knoxville to Philadelphia?

Airfare is below average for this route at the moment.

Knoxville to Philadelphia flights typically cost between $393 and $546 in September.
The cheapest round-trip price found within the last 5 days was $61 on Allegiant Air (Sep 11-Sep 14).

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Philadelphia. Reviews last updated July 29, 2026.
Read through reviews of airlines operating flights from Knoxville to Philadelphia, such as Allegiant Air and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Allegiant Air
7.3
Good
681 reviews

Boarding

7.7

Comfort

6.9

Entertainment

5.4

Crew

8.1

Overall

7.3

Food

5.8

Reviews

1 / 20
10.0
Excellent

Jeff,Jun 2026

DEN - TYS

Everything about the flight timing was perfect. The plane was clean and comfortable. The only aggravation is no access to phone charging or complementary food/drink on a cross-country trip. There were no entertainment options, so I'm not sure how I'm supposed to evaluate that on a survey. It's a discount carrier, I get it, but other options are flying the same route with better depart/arrival times that offer these options.
Allegiant Air
7.3
Good
681 reviews
Allegiant Air
7.3
Good
681 reviews

Boarding

7.7

Comfort

6.9

Entertainment

5.4

Crew

8.1

Overall

7.3

Food

5.8

Reviews

1 / 20
10.0
Excellent

Jeff,Jun 2026

DEN - TYS

Everything about the flight timing was perfect. The plane was clean and comfortable. The only aggravation is no access to phone charging or complementary food/drink on a cross-country trip. There were no entertainment options, so I'm not sure how I'm supposed to evaluate that on a survey. It's a discount carrier, I get it, but other options are flying the same route with better depart/arrival times that offer these options.
American Airlines
7.1
Good
11,840 reviews
Allegiant Air
7.3
Good
681 reviews

Boarding

7.7

Comfort

6.9

Entertainment

5.4

Crew

8.1

Overall

7.3

Food

5.8

Reviews

1 / 20
10.0
Excellent

Jeff,Jun 2026

DEN - TYS

Everything about the flight timing was perfect. The plane was clean and comfortable. The only aggravation is no access to phone charging or complementary food/drink on a cross-country trip. There were no entertainment options, so I'm not sure how I'm supposed to evaluate that on a survey. It's a discount carrier, I get it, but other options are flying the same route with better depart/arrival times that offer these options.

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Knoxville to Philadelphia?

    If you wish to fly to Philadelphia from Knoxville, then you need to book flights from Knoxville McGhee Tyson to Philadelphia. There are 4 flights from McGhee Tyson (TYS) to Philadelphia (PHL) per day to choose from. Flights to Philadelphia from McGhee Tyson are available from 2 different airlines, which means you should have some options if you want to compare airfare deals. 1h 50m is how long a nonstop flight from Knoxville to Philadelphia typically takes.

  • How popular is this Knoxville to Philadelphia flight route?

    Flights from Knoxville McGhee Tyson to Philadelphia have been viewed 17 times in the past calendar month.

  • How long is the flight from Knoxville to Philadelphia?

    For as low as $78, Allegiant Air can have you in Philadelphia from Knoxville in 1h 50m. The distance from Knoxville to Philadelphia is about 553 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Knoxville to Philadelphia round-trip?

    Flying on Allegiant Air is currently your cheapest option to Philadelphia, with prices starting at $78. Another option worth looking into is American Airlines, starting at $360 round trip. Users have found that Allegiant Air is 83% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Knoxville to Philadelphia one-way?

    $39 is the cheapest one-way deal found within the past few days, from Allegiant Air. You may also be able to find cheap deals on Southwest and American Airlines, with prices starting from $148 and $258, respectively.

  • What are the most reliable airlines from Knoxville to Philadelphia?

    Consider PSA Airlines (84%), British Airways (75%) or American Airlines (73%) when booking your flight. These represent the most reliable airlines when flying from Knoxville to Philadelphia.

  • What are the cheapest flights from Knoxville to Philadelphia?

    Looking for the cheapest flight from Knoxville to Philadelphia? While on average our users pay $1,087, our data indicates the cheapest price to be $62. The most popular route (Knoxville McGhee Tyson - Philadelphia), is priced around $61.

  • Can I find deals for flights from Knoxville to Philadelphia that include hotel bookings?

    Yes. In addition to deals on Knoxville to Philadelphia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Philadelphia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Philadelphia.

  • Can I find deals for business class flights from Knoxville to Philadelphia?

    Yes. Cheapflights offers flight deals from Knoxville to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Philadelphia?

    Currently, June is the cheapest month in which you can book a flight from Knoxville to Philadelphia (average of $337). Flying from Knoxville to Philadelphia in April is currently the most expensive (average of $585). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Reading
King of Prussia
Camden
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland

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Alternative routes for Knoxville to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Knoxville to Philadelphia

Discover the top 2 airlines that operate flights from Knoxville to Philadelphia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$78Average$113FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$360Average$515FlexibilityNo cancel feeOn-time71%

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