Cheap flights from Knoxville, TN to Pittsburgh, PA

Flights starting at $111. Choose between Allegiant Air, Spirit Airlines, or United Airlines to find the best price.

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The most popular airlines for this route are Allegiant Air, Spirit Airlines, United Airlines, Frontier Airlines, and Southern Airways Express. Knoxville and Pittsburgh have 127 direct flights per week.

Check-in for a flight from Knoxville to Pittsburgh

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Allegiant AirAAYG4NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Southern Airways ExpressFDY9XYesNo

Weather in Pittsburgh

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January1°C-5°C
February4°C-4°C
March9°C0°C
April16°C5°C
May22°C11°C
June26°C15°C
July29°C18°C
August28°C17°C
September24°C14°C
October17°C8°C
November10°C1°C
December5°C-1°C
Hottest Month
29°C
July
Coldest month
-5°C
January
Sunny days
230
days per year
Snow days
15
days per year

14 day forecast

Monday
18 Mar
87%
3°C-2°C
25 Mar
75%
9°C1°C
Tuesday
19 Mar
8°C-2°C
26 Mar
87%
10°C5°C
Wednesday
20 Mar
89%
7°C0°C
27 Mar
84%
16°C9°C
Thursday
21 Mar
4°C-3°C
28 Mar
89%
9°C3°C
Friday
22 Mar
67%
9°C-3°C
29 Mar
15°C1°C
Saturday
23 Mar
83%
2°C-4°C
30 Mar
17°C5°C
Sunday
24 Mar
5°C-5°C
31 Mar
86%
15°C10°C

Frequently asked questions

What are the most popular routes to and from Knoxville?
What are the most popular routes to and from Pittsburgh?
What airports are near Knoxville?
What airports are near Pittsburgh?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Knoxville and Pittsburgh?
What is Virtual Interlining and how do I use it?
Which airlines fly between Knoxville and Pittsburgh?
When's the best time to travel between Knoxville and Pittsburgh?
What flights operate between Knoxville and Pittsburgh?
How many airports are there near Knoxville?
How many airports are there near Pittsburgh?
What time do nonstop (direct) flights between Knoxville and Pittsburgh depart?
What time do nonstop (direct) flights between Knoxville and Pittsburgh arrive?
What time do flights between Knoxville and Pittsburgh depart?
What time do flights between Knoxville and Pittsburgh arrive?

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