Cheap flights from Knoxville to Boston

One-way fares from $124 · TYS → BOS · prices found by travellers in the last 48 hours

Compare all dates Boston → Knoxville
Cheapest fare
$124

Allegiant Air · Tue, Dec 29

Cheapest month
December

from $124

Direct flights
Yes

Allegiant Air

Flight time
2h 11m

1,320 km

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Cheapest month to fly from Knoxville to Boston

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. December 2026 Cheapest $124

Cheapest dates in December 2026

The lowest fares we've seen for each day, cheapest first.

Allegiant Air
Depart06:15 Tue, Dec 29TYS → BOS 2h 11m · Direct
$124one way, per person
View deal
Allegiant Air
Depart21:04 Mon, Dec 28TYS → BOS 5h 37m · 2 stops
$231one way, per person
View deal
See every date in December 2026 →

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Getting around

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About flights from Knoxville to Boston

Knoxville (TYS) and Boston (BOS) are about 1,320 km apart. Direct flights take around 2h 11m, and recent direct fares were with Allegiant Air. Over the next few months, one-way fares start from $124, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Knoxville to Boston?

The cheapest one-way fare we've seen recently is $124 with Allegiant Air, departing Tuesday, December 29, 2026.

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

December 2026 currently has the lowest fares, from $124 one way.

Are there direct flights from Knoxville to Boston?

Yes. Recent direct fares were with Allegiant Air.

How long is the flight from Knoxville to Boston?

A direct flight takes about 2h 11m. Knoxville and Boston are around 1,320 km apart.

Which airlines fly from Knoxville to Boston?

Recent fares on this route were with Allegiant Air.

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