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$148+ Cheap flights from Knoxville to San Diego (TYS - SAN)

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 12/22. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SAN
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to San Diego are usually found in July or February, booked 7 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Knoxville to San Diego

Cheapest flights from Knoxville to San Diego
Explore the most affordable flight options available from Knoxville to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 8, 2025.

This Priceline deal was found by Cheapflights users on 12/6. 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.
Sun 12/214:26 pmTYS - SAN
1 stop10h 33mFrontier
Thu 12/256:25 amSAN - TYS
1 stop6h 06mFrontier
Deal found 12/6$307
This United Airlines deal was found by Cheapflights users on 12/6. 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 12/1610:50 amTYS - SAN
1 stop7h 40mUnited Airlines
Tue 2/310:52 amSAN - TYS
1 stop7h 00mUnited Airlines
Deal found 12/6$349
This Kiwi.com deal was found by Cheapflights users on 12/8. 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.
Wed 12/241:58 pmTYS - SAN
1 stop13h 01mMultiple Airlines
Wed 1/77:00 amSAN - TYS
1 stop29h 28mMultiple Airlines
Deal found 12/8$365
This Booking.com deal was found by Cheapflights users on 12/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/114:52 pmTYS - SAN
1 stop29h 23mFrontier
Sun 12/146:34 amSAN - TYS
1 stop6h 23mFrontier
Deal found 12/6$411
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/1710:50 amTYS - SAN
1 stop7h 40mUnited Airlines
Sat 1/177:52 pmSAN - TYS
2 stops11h 40mUnited Airlines
Deal found 12/8$444
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/246:45 amTYS - SAN
2 stops9h 14mUnited Airlines
Wed 1/79:00 amSAN - TYS
2 stops8h 52mUnited Airlines
Deal found 12/8$454
This Kiwi.com deal was found by Cheapflights users on 12/6. 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.
Thu 12/116:30 amTYS - SAN
1 stop15h 45mMultiple Airlines
Sun 12/142:30 pmSAN - TYS
2 stops22h 27mMultiple Airlines
Deal found 12/6$499
This Kiwi.com deal was found by Cheapflights users on 12/7. 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.
Sat 12/209:23 pmTYS - SAN
2 stops42h 15mMultiple Airlines
Sat 1/39:32 amSAN - TYS
1 stop8h 10mMultiple Airlines
Deal found 12/7$527

Find flight deals from Knoxville to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to San Diego (SAN). 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 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$150
(Frontier)

One-way from

$148
(Priceline)

Popular in

December

Cheapest in

July

Average price

$525
Provider with most accurate pricing for Knoxville McGhee Tyson-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-San Diego flights.
Search Deals
From Knoxville McGhee Tyson to San Diego
Search Deals
One-way flight from Knoxville McGhee Tyson to San Diego
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($58 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 Knoxville to San Diego 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 8, 2025.
Use the filters below to find and compare flights from Knoxville to San Diego that are best for you.

Fly from

Knoxville

Fly to

San Diego

Route

Depart

Return

Price

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Mon 1/5

4:46 pm-11:59 pm

1 stop10h 13m

San Diego

Fri 1/9

2:24 pm-8:39 am

2 stops39h 15m

$272

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Sat 1/10

5:40 am-12:03 pm

1 stop9h 23m

San Diego

Sat 1/17

6:15 am-7:24 pm

1 stop10h 09m

$277

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Tue 1/20

2:25 pm-8:47 pm

1 stop9h 22m

San Diego

Sat 1/24

11:10 am-11:44 pm

2 stops9h 34m

$282

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Wed 1/7

4:25 pm-8:42 pm

1 stop7h 17m

San Diego

Sat 1/24

11:08 am-11:44 pm

2 stops9h 36m

$282

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Sun 12/21

4:26 pm-11:59 pm

1 stop10h 33m

San Diego

Thu 12/25

6:25 am-3:31 pm

1 stop6h 06m

$307

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Wed 12/24

1:58 pm-9:57 am

2 stops22h 59m

San Diego

Wed 1/7

3:29 pm-3:28 pm

1 stop20h 59m

$307

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Thu 3/12

4:23 pm-12:01 am

1 stop10h 38m

San Diego

Sun 3/15

7:21 pm-10:39 pm

1 stop24h 18m

$339

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Wed 1/7

2:37 pm-7:39 pm

1 stop8h 02m

San Diego

Tue 2/17

2:15 pm-11:52 pm

1 stop6h 37m

$354

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Wed 1/7

4:06 pm-10:45 pm

1 stop9h 39m

San Diego

Tue 2/24

3:15 pm-9:04 am

2 stops14h 49m

$367

KnoxvilleSan Diego

TYS - SAN

TYSSAN

Knoxville McGhee Tyson

Sat 2/28

12:20 pm-9:49 pm

2 stops12h 29m

San Diego

Wed 3/4

7:02 am-5:33 pm

1 stop7h 31m

$372

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 20 results
1
2

Compare providers for flights from Knoxville to San Diego

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

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 Diego

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

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to San Diego. Price data was last updated on December 5, 2025.

The best time to book flights from Knoxville to San Diego is 7 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 Diego?

Currently, March is the cheapest month in which you can book a flight from Knoxville to San Diego (average of $114). Flying from Knoxville to San Diego in November is currently the most expensive (average of $273). 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 SAN?

Find hourly flight availability from Knoxville to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 8, 2025.

A simple way to save on the total cost of your ticket is to fly from Knoxville to San Diego in the evening. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight in the morning.

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

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

Travelers seeking maximum savings on their Knoxville to San Diego flight should consider departing on Tuesday 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 Diego

Get insights into the airlines that provide service to San Diego. 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 Diego. Reviews last updated December 8, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines from Knoxville to San Diego by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,412 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,412 reviews
Alaska Airlines
8.0
Very good
11,412 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
7.9
Good
8,013 reviews
Alaska Airlines
8.0
Very good
11,412 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
9,076 reviews
Alaska Airlines
8.0
Very good
11,412 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
11,042 reviews
Alaska Airlines
8.0
Very good
11,412 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,088 reviews
Alaska Airlines
8.0
Very good
11,412 reviews

Overall

8.0

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

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

    Delta, United Airlines, and Frontier can get you from Knoxville to San Diego in just under 9h 22m. Your travel time can differ by up to 1h 11m. The distance between Knoxville and San Diego is about 1897 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 Diego round-trip?

    Frontier, at $139, was found to be the cheapest airline from Knoxville to San Diego.Alternate airlines to your destination round-trip include Delta and American Airlines. Frontier is priced at 66% 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 Diego one-way?

    One-way options have recently been found by users for as low as $110 on Frontier. Other airlines that offer cheap prices include American Airlines from $114 and United Airlines from $114 one-way.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Knoxville to San Diego (average of $114). Flying from Knoxville to San Diego in November is currently the most expensive (average of $273). 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 Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
Lemon Grove
Julian
National City

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Top 5 airlines flying from Knoxville to San Diego

Discover the top 5 airlines that operate flights from Knoxville to San Diego. 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 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$219FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$258Average$423FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$258Average$454FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$371FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$366Average$496FlexibilityNo cancel feeOn-time75%

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