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$91+ Cheap flights from San Francisco to Knoxville (SFO - TYS)

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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — TYS
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from San Francisco to Knoxville McGhee Tyson are usually found in August or July, booked 83 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from San Francisco to Knoxville

Cheapest flights from San Francisco to Knoxville
Explore the most affordable flight options available from San Francisco to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:49 pmSFO - TYS
1 stop9h 01mAmerican Airlines
Tue 1/64:41 pmTYS - SFO
1 stop7h 56mAmerican Airlines
Deal found 12/16$412
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Tue 12/304:07 pmSFO - TYS
1 stop25h 32mMultiple Airlines
Tue 1/67:22 pmTYS - SFO
2 stops30h 37mMultiple Airlines
Deal found 12/16$441
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:55 pmSFO - TYS
1 stop8h 04mUnited Airlines
Mon 12/299:50 amTYS - SFO
1 stop8h 56mUnited Airlines
Deal found 12/15$491
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/165:00 amSFO - TYS
1 stop7h 07mUnited Airlines
Tue 12/238:40 amTYS - SFO
1 stop7h 37mUnited Airlines
Deal found 12/15$495
This Kiwi.com deal was found by Cheapflights users on 12/17. 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 12/296:00 amSFO - TYS
1 stop8h 02mMultiple Airlines
Tue 1/67:22 pmTYS - SFO
2 stops30h 37mMultiple Airlines
Deal found 12/17$505
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/179:20 pmSFO - TYS
1 stop10h 36mUnited Airlines
Mon 12/224:04 pmTYS - SFO
1 stop10h 01mUnited Airlines
Deal found 12/15$507
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1712:00 pmSFO - TYS
2 stops8h 59mAmerican Airlines
Mon 12/225:23 amTYS - SFO
1 stop8h 54mAmerican Airlines
Deal found 12/15$512
This United Airlines deal was found by Cheapflights users on 12/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:45 amSFO - TYS
1 stop10h 06mUnited Airlines
Tue 1/62:25 pmTYS - SFO
1 stop11h 32mUnited Airlines
Deal found 12/17$564
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1812:01 pmSFO - TYS
1 stop8h 17mDelta
Thu 12/257:39 amTYS - SFO
1 stop10h 00mDelta
Deal found 12/16$567
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1612:20 pmSFO - TYS
2 stops8h 39mAmerican Airlines
Tue 12/235:40 pmTYS - SFO
1 stop8h 21mAmerican Airlines
Deal found 12/15$592
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:00 amSFO - TYS
1 stop9h 41mAmerican Airlines
Thu 12/255:23 amTYS - SFO
2 stops9h 58mAmerican Airlines
Deal found 12/16$620

Find flight deals from San Francisco to Knoxville

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Knoxville (TYS). 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$183
(Frontier)

One-way from

$91
(Frontier)

Popular in

January

Cheapest in

August

Average price

$546
Provider with most accurate pricing for San Francisco-Knoxville McGhee Tyson flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Knoxville McGhee Tyson flights.
Search Deals
From San Francisco to Knoxville McGhee Tyson
Search Deals
One-way flight from San Francisco to Knoxville McGhee Tyson
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Knoxville 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 December 18, 2025.
Use the filters below to find and compare flights from San Francisco to Knoxville that are best for you.

Fly from

San Francisco

Fly to

Knoxville

Route

Depart

Return

Price

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Thu 1/8

6:05 am-3:28 pm

1 stop6h 23m

Knoxville McGhee Tyson

Thu 1/15

8:18 pm-11:00 am

1 stop17h 42m

$183

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Sat 2/21

7:08 pm-5:22 pm

1 stop19h 14m

Knoxville McGhee Tyson

Thu 2/26

8:30 am-5:58 pm

1 stop12h 28m

$283

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Sat 2/21

7:08 pm-5:22 pm

1 stop19h 14m

Knoxville McGhee Tyson

Wed 2/25

3:50 pm-7:48 am

2 stops18h 58m

$319

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Sat 2/21

11:59 pm-10:19 am

1 stop7h 20m

Knoxville McGhee Tyson

Wed 2/25

7:05 am-12:11 pm

1 stop8h 06m

$329

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Tue 2/3

12:17 am-11:31 am

1 stop8h 14m

Knoxville McGhee Tyson

Sun 2/8

12:21 pm-7:12 pm

1 stop9h 51m

$329

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Wed 2/18

6:55 am-10:10 pm

2 stops36h 15m

Knoxville McGhee Tyson

Mon 2/23

1:40 pm-7:21 pm

1 stop8h 41m

$353

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Mon 1/12

1:19 pm-11:44 pm

1 stop7h 25m

Knoxville McGhee Tyson

Thu 1/15

7:20 pm-1:30 am

1 stop9h 10m

$385

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Mon 1/12

9:10 am-10:47 pm

2 stops10h 37m

Knoxville McGhee Tyson

Thu 1/15

6:51 pm-11:12 pm

1 stop7h 21m

$390

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Thu 1/1

6:24 am-3:31 pm

1 stop6h 07m

Knoxville McGhee Tyson

Mon 1/5

4:46 pm-3:53 pm

2 stops26h 07m

$409

San FranciscoKnoxville

SFO - TYS

SFOTYS

San Francisco

Thu 1/22

9:20 pm-10:57 am

1 stop10h 37m

Knoxville McGhee Tyson

Sun 1/25

7:20 pm-1:30 am

1 stop9h 10m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 20 results
1
2

Compare providers for flights from San Francisco to Knoxville

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 San Francisco to Knoxville in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust 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 San Francisco-Knoxville flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Francisco-Knoxville flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Francisco-Knoxville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Knoxville flights, Cheapflights users trust eDreams the most. eDreams 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 San Francisco-Knoxville 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 San Francisco to Knoxville

Have a flexible travel schedule? Discover the best time to fly to Knoxville from San Francisco 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 San Francisco to Knoxville

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

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Knoxville. Price data was last updated on December 12, 2025.

Booking 28 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Knoxville. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, May is the cheapest month in which you can book a flight from San Francisco to Knoxville (average of $138). Flying from San Francisco to Knoxville in December is currently the most expensive (average of $308). 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 SFO to TYS?

Find hourly flight availability from San Francisco to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s optimal to fly from San Francisco to Knoxville in the afternoon. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight at noon.

Reviews of airlines servicing Knoxville

Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated December 18, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from San Francisco to Knoxville to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
7.9
Good
8,005 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
United Airlines
7.4
Good
9,092 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
American Airlines
7.2
Good
11,055 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Frontier
5.8
Fair
3,081 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

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

  • How long is the flight from San Francisco to Knoxville?

    A quick flight from San Francisco to Knoxville can take about 6h 23m. Frontier provides one of the quickest options available for as low as $183. Airlines will cover a distance of 2114 mi. This flight may include one or multiple stops.

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

    Flying on Frontier is currently your cheapest option to Knoxville, with prices starting at $89. Additional round-trip tickets that might be worth considering are offered by American Airlines and Delta, with the lowest prices starting at $308 and $308, respectively. Users have found that Frontier is 81% cheaper than the other options available to this destination.

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

    One-way options have recently been found by users for as low as $81 on Frontier. Other airlines that offer cheap prices include United Airlines from $162 and American Airlines from $174 one-way.

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

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

  • How can I find direct flights from San Francisco to Knoxville?

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Knoxville 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 San Francisco to Knoxville?

    Currently, May is the cheapest month in which you can book a flight from San Francisco to Knoxville (average of $138). Flying from San Francisco to Knoxville in December is currently the most expensive (average of $308). 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 Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee
Crossville
Corbin
Morristown
Bryson City
Alcoa
Oak Ridge
Murphy

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Top 4 airlines flying from San Francisco to Knoxville

Discover the top 4 airlines that operate flights from San Francisco to Knoxville. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$149Average$278FlexibilityNo cancel feeOn-time62%
DeltaCheapest$308Average$429FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$308Average$490FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$328Average$551FlexibilityNo cancel feeOn-time69%

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