Cheap flights from Portland, ME to Knoxville, TN
Flights starting at $92. Choose between Frontier Airlines, Allegiant Air, or United Airlines to find the best price.
Make your travel wishlist, we'll do the rest
Hidden deals
Kiwi-Code uncovers prices airlines don't want you to see.
Effortless booking
Use our flexible filters to tailor your search.
Travel hacking
Look out for the travel hack star icon for even cheaper fares.
Tips to know when travelling to Knoxville
Cheapest one-way trip | $92 |
---|---|
Cheapest round-trip | $235 |
Average round-trip | $320 |
Includes rare itinerary | |
Most popular airline | Frontier Airlines |
Search by stops
- Nonstop
- Up to 1 stop
- Up to 2 stops
Search by carrier
Search by price
Search by departure date
Looking for a different city?
Receive exclusive deals by email
By subscribing you agree to receive offers according to the conditions described in our Privacy Policy.
The most popular airlines for this route are Frontier Airlines, Allegiant Air, United Airlines, Spirit Airlines, and BREEZE. Portland and Knoxville have 50 direct flights per week.
Check-in for a flight from Portland to Knoxville
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
BREEZE | MX | No | No |
Weather in Knoxville
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 7°C | 0°C |
February | 10°C | 1°C |
March | 15°C | 4°C |
April | 20°C | 8°C |
May | 25°C | 13°C |
June | 29°C | 18°C |
July | 30°C | 20°C |
August | 30°C | 19°C |
September | 27°C | 16°C |
October | 21°C | 10°C |
November | 14°C | 4°C |
December | 10°C | 2°C |
14 day forecast
Frequently asked questions
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
Explore alternative trips
Flights from Portland
- Flights from Portland to Orlando
- Flights from Portland to Denver
- Flights from Portland to Tampa
- Flights from Portland to Raleigh
- Flights from Portland to Fort Myers
- Flights from Portland to Washington, D.C.
- Flights from Portland to Las Vegas
- Flights from Portland to Fort Lauderdale
- Flights from Portland to Austin
- Flights from Portland to Los Angeles
- Flights from Portland to Minneapolis
- Flights from Portland to San Juan
- Flights from Portland to Albuquerque
- Flights from Portland to Charlotte
- Flights from Portland to Chicago
- Flights from Portland to Cincinnati
- Flights from Portland to Nashville
- Flights from Portland to Houston
- Flights from Portland to San Diego
- Flights from Portland to Indianapolis
Flights to Knoxville
- Flights from New York to Knoxville
- Flights from Denver to Knoxville
- Flights from Las Vegas to Knoxville
- Flights from Los Angeles to Knoxville
- Flights from Orlando to Knoxville
- Flights from Fort Lauderdale to Knoxville
- Flights from Salt Lake City to Knoxville
- Flights from Tampa to Knoxville
- Flights from San Diego to Knoxville
- Flights from Chicago to Knoxville
- Flights from San Francisco to Knoxville
- Flights from Austin to Knoxville
- Flights from San Juan to Knoxville
- Flights from Portland to Knoxville
- Flights from Boston to Knoxville
- Flights from Sacramento to Knoxville
- Flights from Seattle to Knoxville
- Flights from Houston to Knoxville
- Flights from Washington, D.C. to Knoxville
- Flights from Phoenix to Knoxville
Popular routes
- Flights from Los Angeles to Cancún
- Flights from Richmond to Lyon
- Flights from New York to Paris
- Flights from Syracuse to Dushanbe
- Flights from Trenton to Kabul
- Flights from Los Angeles to Memmingen
- Flights from Fort Myers to Fukuoka
- Flights from Fort Wayne to Des Moines
- Flights from Green Bay to Madrid
- Flights from Tallahassee to San Andrés
- Flights from Hilo to Kozhikode
- Flights from Bozeman to Pune
- Flights from Phoenix to Chicago