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$134+ Cheap flights from Knoxville to San Antonio (TYS - SAT)

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SAT
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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Cheap flight deals from Knoxville to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to San Antonio (SAT). 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 January 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$217
(Delta)

One-way from

$134
(Kiwi.com)

Popular in

October

Cheapest in

July

Average price

$268
Provider with most accurate pricing for Knoxville McGhee Tyson-San Antonio flight deals.
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Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-San Antonio flights.
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From Knoxville McGhee Tyson to San Antonio
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One-way flight from Knoxville McGhee Tyson to San Antonio
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Highest demand for flights based on searches. 4% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Knoxville to San Antonio

Cheapest flights from Knoxville to San Antonio
Explore the most affordable flight options available from Knoxville to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

This Delta deal was found by Cheapflights users on 1/5. 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 3/115:30 amTYS - SAT
1 stop5h 25mDelta
Tue 3/176:13 amSAT - TYS
1 stop4h 02mDelta
Deal found 1/5$217
This Delta deal was found by Cheapflights users on 1/5. 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 2/22:37 pmTYS - SAT
1 stop6h 48mDelta
Mon 2/95:20 amSAT - TYS
1 stop4h 48mDelta
Deal found 1/5$237
This American Airlines deal was found by Cheapflights users on 1/3. 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.
Sat 1/176:51 pmTYS - SAT
1 stop5h 07mAmerican Airlines
Sat 1/245:00 pmSAT - TYS
1 stop5h 21mAmerican Airlines
Deal found 1/3$243
This Delta deal was found by Cheapflights users on 1/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/56:41 pmTYS - SAT
1 stop6h 58mDelta
Sun 2/86:17 pmSAT - TYS
1 stop4h 28mDelta
Deal found 1/6$253
This Delta deal was found by Cheapflights users on 1/4. 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.
Sat 1/172:37 pmTYS - SAT
1 stop7h 06mDelta
Sat 1/245:30 amSAT - TYS
1 stop5h 43mDelta
Deal found 1/4$258
This Delta deal was found by Cheapflights users on 1/5. 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 1/212:37 pmTYS - SAT
1 stop6h 48mDelta
Wed 1/285:20 amSAT - TYS
1 stop4h 48mDelta
Deal found 1/5$268
This Delta deal was found by Cheapflights users on 1/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/265:30 amTYS - SAT
1 stop5h 25mDelta
Mon 3/3010:50 amSAT - TYS
1 stop4h 16mDelta
Deal found 1/6$269
This Southwest deal was found by Cheapflights users on 1/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:35 amTYS - SAT
2 stops8h 55mSouthwest
Sat 4/115:55 amSAT - TYS
1 stop6h 25mSouthwest
Deal found 1/4$273
This United Airlines deal was found by Cheapflights users on 1/5. 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.
Sat 1/174:55 pmTYS - SAT
1 stop5h 26mUnited Airlines
Mon 1/195:59 pmSAT - TYS
1 stop4h 45mUnited Airlines
Deal found 1/5$284
This deal was found by Cheapflights users on 1/5. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/145:40 amTYS - SAT
1 stop4h 53mAmerican Airlines
Sat 2/215:00 amSAT - TYS
1 stop5h 31mAmerican Airlines
Deal found 1/5$287
This Kiwi.com deal was found by Cheapflights users on 1/3. 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 3/29:36 pmTYS - SAT
1 stop12h 54mMultiple Airlines
Fri 3/63:26 pmSAT - TYS
2 stops17h 14mMultiple Airlines
Deal found 1/3$290

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to San Antonio 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 January 6, 2026.
Use the filters below to find and compare flights from Knoxville to San Antonio that are best for you.

Fly from

Knoxville

Fly to

San Antonio

Route

Depart

Return

Price

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sat 1/17

2:37 pm-8:43 pm

1 stop7h 06m

San Antonio

Sat 1/24

5:30 am-12:13 pm

1 stop5h 43m

$258

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Tue 1/20

5:40 am-9:50 am

1 stop5h 10m

San Antonio

Sat 1/24

5:30 am-12:13 pm

1 stop5h 43m

$258

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 1/21

5:40 am-9:50 am

1 stop5h 10m

San Antonio

Tue 1/27

5:20 am-11:08 am

1 stop4h 48m

$268

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 1/21

2:37 pm-8:25 pm

1 stop6h 48m

San Antonio

Wed 1/28

5:20 am-11:08 am

1 stop4h 48m

$268

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Fri 1/23

5:40 am-9:50 am

1 stop5h 10m

San Antonio

Tue 1/27

8:00 am-1:50 pm

1 stop4h 50m

$268

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Fri 1/23

6:41 pm-12:38 am

1 stop6h 57m

San Antonio

Wed 1/28

5:30 am-12:13 pm

1 stop5h 43m

$268

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Thu 1/22

4:06 pm-8:25 pm

1 stop5h 19m

San Antonio

Wed 1/28

5:20 am-11:08 am

1 stop4h 48m

$268

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 1/21

2:37 pm-8:25 pm

1 stop6h 48m

San Antonio

Mon 1/26

5:20 am-11:08 am

1 stop4h 48m

$268

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Thu 3/26

6:38 pm-12:38 am

1 stop7h 00m

San Antonio

Mon 3/30

10:50 am-4:06 pm

1 stop4h 16m

$269

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Thu 2/5

2:37 pm-8:25 pm

1 stop6h 48m

San Antonio

Sun 2/8

6:30 am-1:50 pm

1 stop6h 20m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 13 results
1
2

Compare providers for flights from Knoxville to San Antonio

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 Antonio in January.
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 Antonio flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Knoxville-San Antonio flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Knoxville-San Antonio flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-San Antonio 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 Antonio 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 Antonio

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

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

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to San Antonio. Price data was last updated on January 2, 2026.

To ensure you get the cheapest price possible for a flight from Knoxville to San Antonio, you should look to book at least 60 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, May is the cheapest month in which you can book a flight from Knoxville to San Antonio (average of $86). Flying from Knoxville to San Antonio in January is currently the most expensive (average of $127). 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.

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. 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 Antonio. Reviews last updated January 6, 2026.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Knoxville to San Antonio 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
8,018 reviews

Comfort

7.9

Entertainment

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,018 reviews
Delta
7.9
Good
8,018 reviews

Comfort

7.9

Entertainment

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,132 reviews
Delta
7.9
Good
8,018 reviews

Comfort

7.9

Entertainment

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,084 reviews
Delta
7.9
Good
8,018 reviews

Comfort

7.9

Entertainment

7.8

Crew

8.5

Boarding

8.1

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

    Departing from Knoxville to San Antonio will take you 7h 06m. The distance between Knoxville and San Antonio is about 945 mi.

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

    Our cheapest airline available from Knoxville to San Antonio is Delta. Our recent data shows that you can find tickets from as low as $207 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $232 and $237 round-trip. Delta is 38% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Knoxville to San Antonio are Delta ($159), American Airlines ($198), and United Airlines ($198).

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Knoxville to San Antonio (average of $86). Flying from Knoxville to San Antonio in January is currently the most expensive (average of $127). 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 Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville

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Top 3 airlines flying from Knoxville to San Antonio

Discover the top 3 airlines that operate flights from Knoxville to San Antonio. 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 January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$207Average$306FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$232Average$340FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$237Average$362FlexibilityNo cancel feeOn-time69%

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