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Cheap flights from Knoxville to Washington from $128

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Washington departing on 10/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:17 pm - 11:56 amTYS-PDX
19h 39m1 stop
Frontier Logo
12:52 pm - 6:22 pmPDX-TYS
26h 30m1 stop
$128Frontier
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Thu, Oct 30 - Sat, Nov 8
Frontier Logo
7:17 pm - 12:13 pmTYS-SEA
19h 56m1 stop
Frontier Logo
12:58 pm - 6:22 pmSEA-TYS
26h 24m1 stop
$129Frontier
Find Deal
Thu, Oct 30 - Sat, Nov 8
Multiple Airlines Logo
2:50 pm - 12:13 pmTYS-SEA
24h 23m2 stops
Multiple Airlines Logo
12:58 pm - 1:44 pmSEA-TYS
21h 46m1 stop
$250Multiple Airlines
Find Deal
Thu, Oct 30 - Sat, Nov 8
Multiple Airlines Logo
9:06 am - 11:57 amTYS-SEA
29h 51m2 stops
Multiple Airlines Logo
12:58 pm - 1:44 pmSEA-TYS
21h 46m1 stop
$251Multiple Airlines
Find Deal
Sat, Nov 8 - Sat, Nov 15
Delta Logo
6:40 am - 12:50 pmTYS-PDX
9h 10m1 stop
Delta Logo
10:10 pm - 9:37 amPDX-TYS
8h 27m1 stop
$269Delta
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Sat, Nov 1 - Sat, Nov 8
Delta Logo
7:45 am - 5:27 pmTYS-PDX
12h 42m2 stops
Delta Logo
10:10 pm - 10:45 amPDX-TYS
9h 35m1 stop
$274Delta
Find Deal
Wed, Nov 5 - Tue, Nov 11
American Airlines Logo
5:10 am - 1:04 pmTYS-PDX
10h 54m1 stop
American Airlines Logo
10:15 pm - 8:34 amPDX-TYS
7h 19m1 stop
$349American Airlines
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Wed, Nov 5 - Wed, Nov 5
American Airlines Logo
1:13 pm - 11:18 pmTYS-SEA
13h 05m1 stop
American Airlines Logo
12:59 am - 2:29 pmSEA-TYS
10h 30m1 stop
$355American Airlines
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Wed, Nov 12 - Sat, Nov 15
United Airlines Logo
6:45 am - 11:48 amTYS-PDX
8h 03m1 stop
United Airlines Logo
8:20 am - 8:20 pmPDX-TYS
9h 00m1 stop
$383United Airlines
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Tue, Nov 4 - Fri, Nov 7
United Airlines Logo
1:52 pm - 12:46 amTYS-PDX
13h 54m2 stops
United Airlines Logo
6:00 am - 11:44 pmPDX-TYS
14h 44m3 stops
$424United Airlines
Find Deal
Sat, Nov 8 - Wed, Nov 12

Frontier flights from Knoxville to State of Washington

Our best Frontier deals on Knoxville to State of Washington flight tickets
Frontier
Oct 30
TYS7:17 pmKnoxville McGhee Tyson
19h 39m
1 stop
PDX11:56 amPortland
Nov 8
PDX12:52 pmPortland
26h 30m
1 stop
TYS6:22 pmKnoxville McGhee Tyson
$128
Find similar
Frontier
Oct 30
TYS7:17 pmKnoxville McGhee Tyson
19h 56m
1 stop
SEA12:13 pmSeattle/Tacoma Intl
Nov 8
SEA12:58 pmSeattle/Tacoma Intl
26h 24m
1 stop
TYS6:22 pmKnoxville McGhee Tyson
$129
Find similar
Frontier
Oct 30
TYS7:17 pmKnoxville McGhee Tyson
28h 45m
2 stops
PDX9:02 pmPortland
Nov 8
PDX12:52 pmPortland
26h 30m
1 stop
TYS6:22 pmKnoxville McGhee Tyson
$259
Find similar

American Airlines flights from Knoxville to State of Washington

Our best American Airlines deals on Knoxville to State of Washington flight tickets
American Airlines
Nov 5
TYS5:10 amKnoxville McGhee Tyson
10h 54m
1 stop
PDX1:04 pmPortland
Nov 5
PDX10:15 pmPortland
7h 19m
1 stop
TYS8:34 amKnoxville McGhee Tyson
$349
Find similar
American Airlines
Nov 12
TYS1:13 pmKnoxville McGhee Tyson
13h 05m
1 stop
SEA11:18 pmSeattle/Tacoma Intl
Nov 15
SEA12:59 amSeattle/Tacoma Intl
10h 30m
1 stop
TYS2:29 pmKnoxville McGhee Tyson
$355
Find similar
American Airlines
Dec 12
TYS2:58 pmKnoxville McGhee Tyson
11h 27m
1 stop
SEA11:25 pmSeattle/Tacoma Intl
Jan 1
SEA12:14 amSeattle/Tacoma Intl
12h 42m
1 stop
TYS3:56 pmKnoxville McGhee Tyson
$365
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to State of Washington 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, momondo users made 832,500 searches. Data last updated October 12, 2025.
Use the filters below to find and compare flights from Knoxville to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Thu 10/30

7:17 pm-11:56 am

1 stop19h 39m

Portland

Sat 11/8

12:52 pm-6:22 pm

1 stop26h 30m

$128

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 10/30

7:17 pm-12:13 pm

1 stop19h 56m

Seattle/Tacoma Intl

Sat 11/8

12:58 pm-6:22 pm

1 stop26h 24m

$129

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Thu 10/30

2:50 pm-12:13 pm

2 stops24h 23m

Seattle/Tacoma Intl

Sat 11/8

12:58 pm-1:44 pm

1 stop21h 46m

$250

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Sat 11/8

9:06 am-11:57 am

2 stops29h 51m

Seattle/Tacoma Intl

Sat 11/15

12:58 pm-1:44 pm

1 stop21h 46m

$251

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Sat 11/1

6:40 am-12:50 pm

1 stop9h 10m

Portland

Sat 11/8

10:10 pm-9:37 am

1 stop8h 27m

$269

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Wed 11/5

7:45 am-5:27 pm

2 stops12h 42m

Portland

Tue 11/11

10:10 pm-10:45 am

1 stop9h 35m

$274

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Wed 11/5

5:10 am-1:04 pm

1 stop10h 54m

Portland

Wed 11/5

10:15 pm-8:34 am

1 stop7h 19m

$349

KnoxvilleSeattle

TYS - SEA

TYSSEA

Knoxville McGhee Tyson

Wed 11/12

1:13 pm-11:18 pm

1 stop13h 05m

Seattle/Tacoma Intl

Sat 11/15

12:59 am-2:29 pm

1 stop10h 30m

$355

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Tue 11/4

6:45 am-11:48 am

1 stop8h 03m

Portland

Fri 11/7

8:20 am-8:20 pm

1 stop9h 00m

$383

KnoxvillePortland

TYS - PDX

TYSPDX

Knoxville McGhee Tyson

Sat 11/8

1:52 pm-12:46 am

2 stops13h 54m

Portland

Wed 11/12

6:00 am-11:44 pm

3 stops14h 44m

$424

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington from

How to get the cheapest flight ticket from Knoxville to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to State of Washington?

The month of August is, on average, the cheapest month to fly to State of Washington from Knoxville, with most prices found around $415. If you aren’t able to travel to State of Washington during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $523.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Knoxville to State of Washington is on a Friday. Travelers who choose to depart for State of Washington on a Friday will often find tickets for as low as $596. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to State of Washington for around $746.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $327. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $697 on average. Flights to State of Washington from Knoxville at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to State of Washington?

You are more likely to see cheaper flights to State of Washington from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $629 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Knoxville for as low as $532 on momondo.

Can stopping save me money on Knoxville to State of Washington flights?

You could potentially save up to 65% on your flight if you consider stops on a Knoxville to State of Washington flight.

Cheap Knoxville to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to State of Washington

Direct flights

None
There are no direct flights from Knoxville to State of Washington. There are no popular flight routes from Knoxville to State of Washington.
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  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Washington?

    Prices for flights from Knoxville McGhee Tyson Airport to Washington were last updated today.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Washington?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Washington?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Washington.

  • What documentation or ID do you need to fly to Washington?

    The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Knoxville to State of Washington

Compare and see reviews for airlines that fly from Knoxville to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $209Free CancellationRating
7.9
7,971 reviews
Search Delta flights
FrontierPriceFrom $248Free CancellationRating
5.8
3,137 reviews
Search Frontier flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
11,046 reviews
Search American Airlines flights
United AirlinesPriceFrom $304Free CancellationRating
7.4
8,970 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Washington?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Knoxville to Washington. momondo saves you time and could save you money on your trip.

Can I find flights from Knoxville to Washington with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Washington flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Washington?

momondo provides multiple filters to help you find the best flight to Washington from Knoxville. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Knoxville to Washington right now. Can momondo alert me if prices change?

Price alerts on flights to Washington from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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