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$182+ Cheap flights from Knoxville to San Francisco (TYS - SFO)

This is the cheapest round-trip 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.
TYS — SFO
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to San Francisco are usually found in July or February, booked 27 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Knoxville to San Francisco

Cheapest flights from Knoxville to San Francisco
Explore the most affordable flight options available from Knoxville to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Frontier deal was found by Cheapflights users on 12/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:46 pmTYS - SFO
1 stop10h 38mFrontier
Thu 12/256:24 amSFO - TYS
1 stop6h 07mFrontier
Deal found 12/22$403
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/244:04 pmTYS - SFO
1 stop10h 01mUnited Airlines
Sat 12/278:20 amSFO - TYS
1 stop8h 31mUnited Airlines
Deal found 12/21$434
This United Airlines deal was found by Cheapflights users on 12/22. 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 12/257:00 amTYS - SFO
1 stop8h 14mUnited Airlines
Sun 12/287:00 amSFO - TYS
1 stop7h 00mUnited Airlines
Deal found 12/22$446
This Priceline deal was found by Cheapflights users on 12/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:46 pmTYS - SFO
1 stop10h 38mFrontier
Sun 12/286:24 amSFO - TYS
1 stop6h 07mFrontier
Deal found 12/22$462
This Delta deal was found by Cheapflights users on 12/22. 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.
Wed 12/246:27 amTYS - SFO
1 stop10h 14mDelta
Sun 12/286:00 amSFO - TYS
1 stop9h 14mDelta
Deal found 12/22$494
This Delta deal was found by Cheapflights users on 12/22. 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 12/256:27 amTYS - SFO
2 stops19h 23mDelta
Sat 12/278:00 amSFO - TYS
1 stop8h 27mDelta
Deal found 12/22$532
This United Airlines deal was found by Cheapflights users on 12/22. 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 12/225:15 pmTYS - SFO
1 stop8h 34mUnited Airlines
Tue 12/3011:05 pmSFO - TYS
1 stop8h 12mUnited Airlines
Deal found 12/22$555
This American Airlines deal was found by Cheapflights users on 12/22. 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 12/234:29 pmTYS - SFO
1 stop9h 22mAmerican Airlines
Thu 12/2510:49 amSFO - TYS
2 stops9h 56mAmerican Airlines
Deal found 12/22$560
This Delta deal was found by Cheapflights users on 12/21. 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.
Mon 12/226:59 pmTYS - SFO
1 stop7h 58mDelta
Fri 1/26:00 amSFO - TYS
1 stop6h 51mDelta
Deal found 12/21$567
This United Airlines deal was found by Cheapflights users on 12/22. 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 12/234:04 pmTYS - SFO
1 stop8h 36mUnited Airlines
Wed 12/2410:35 pmSFO - TYS
1 stop9h 21mUnited Airlines
Deal found 12/22$570
This American Airlines deal was found by Cheapflights users on 12/22. 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 12/255:23 amTYS - SFO
2 stops9h 58mAmerican Airlines
Sat 12/2712:59 amSFO - TYS
1 stop7h 29mAmerican Airlines
Deal found 12/22$572

Find flight deals from Knoxville to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to San Francisco (SFO). 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 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$182
(Expedia)

Popular in

December

Cheapest in

July

Average price

$510
Provider with most accurate pricing for Knoxville McGhee Tyson-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-San Francisco flights.
Search Deals
From Knoxville McGhee Tyson to San Francisco
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 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 Knoxville to San Francisco 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 23, 2025.
Use the filters below to find and compare flights from Knoxville to San Francisco that are best for you.

Fly from

Knoxville

Fly to

San Francisco

Route

Depart

Return

Price

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Thu 1/8

4:23 pm-8:03 am

1 stop18h 40m

San Francisco

Thu 1/15

6:15 am-7:23 pm

1 stop10h 08m

$182

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Wed 1/21

4:25 pm-9:35 pm

1 stop8h 10m

San Francisco

Wed 1/28

11:56 pm-10:32 am

1 stop7h 36m

$277

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Wed 1/21

12:21 pm-8:10 pm

2 stops10h 49m

San Francisco

Wed 1/28

6:00 am-5:42 pm

1 stop8h 42m

$282

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Mon 2/23

7:25 pm-1:28 am

1 stop9h 03m

San Francisco

Tue 2/24

7:18 am-6:10 pm

1 stop7h 52m

$304

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Thu 1/15

5:15 pm-10:34 pm

1 stop8h 19m

San Francisco

Sun 1/18

12:17 am-11:34 am

1 stop8h 17m

$329

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Sat 4/18

4:30 pm-10:55 pm

1 stop9h 25m

San Francisco

Sat 4/25

5:00 am-3:06 pm

1 stop7h 06m

$329

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Tue 5/5

5:17 am-9:51 am

1 stop7h 34m

San Francisco

Tue 5/12

11:59 pm-11:18 am

1 stop8h 19m

$329

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Thu 1/15

7:20 pm-1:30 am

1 stop9h 10m

San Francisco

Mon 1/19

11:20 pm-10:57 am

1 stop8h 37m

$329

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Sat 2/7

4:25 pm-10:58 pm

1 stop9h 33m

San Francisco

Sun 2/8

1:30 am-2:49 pm

1 stop10h 19m

$329

KnoxvilleSan Francisco

TYS - SFO

TYSSFO

Knoxville McGhee Tyson

Thu 2/5

6:59 am-12:20 pm

1 stop8h 21m

San Francisco

Mon 2/9

10:35 pm-10:57 am

1 stop9h 22m

$329

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 17 results
1
2

Compare providers for flights from Knoxville to San Francisco

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to San Francisco. Price data was last updated on December 19, 2025.

The best time to book flights from Knoxville to San Francisco is 27 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, June is the cheapest month in which you can book a flight from Knoxville to San Francisco (average of $197). Flying from Knoxville to San Francisco in November is currently the most expensive (average of $288). 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 TYS to SFO?

Find hourly flight availability from Knoxville to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

One of the essential ways to save on airfare from Knoxville to San Francisco is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 29% on airfare.

What is the cheapest day to fly from Knoxville to San Francisco?

Use this chart to determine the cheapest time to fly round-trip from Knoxville to San Francisco. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Knoxville to San Francisco flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated December 23, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Knoxville to San Francisco 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
8,014 reviews

Entertainment

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,014 reviews
Delta
7.9
Good
8,014 reviews

Entertainment

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
9,106 reviews
Delta
7.9
Good
8,014 reviews

Entertainment

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
11,054 reviews
Delta
7.9
Good
8,014 reviews

Entertainment

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
5.8
Fair
3,074 reviews
Delta
7.9
Good
8,014 reviews

Entertainment

7.9

Boarding

8.1

Food

7.3

Comfort

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Knoxville to San Francisco. 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 Knoxville to San Francisco?

    Departing from Knoxville to San Francisco will take you 8h 10m. The distance between Knoxville and San Francisco is about 2114 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Flying on Frontier is currently your cheapest option to San Francisco, with prices starting at $180. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $286 and $308, respectively. Frontier is priced at 58% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $121. However, be on the lookout for offers from Frontier and United Airlines, as they are both options that can get you from Knoxville to San Francisco for a low price.

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

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

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

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

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

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

    Currently, June is the cheapest month in which you can book a flight from Knoxville to San Francisco (average of $197). Flying from Knoxville to San Francisco in November is currently the most expensive (average of $288). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
South San Francisco
Santa Cruz
Livermore
Turlock
Manteca
Watsonville
Redwood City
Sunnyvale
San Bruno
Daly City
Santa Clara
San Carlos
Vallejo
Hollister
San Ramon
Foster City
Union City
Davis
Emeryville

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Top 4 airlines flying from Knoxville to San Francisco

Discover the top 4 airlines that operate flights from Knoxville to San Francisco. 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 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$180Average$255FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$286Average$466FlexibilityNo cancel feeOn-time69%
DeltaCheapest$308Average$436FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$308Average$428FlexibilityNo cancel feeOn-time71%

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