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$109+ 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SAT
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
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 Knoxville McGhee Tyson to San Antonio are usually found in July or September, booked 60 days in advance, depart on a Friday or Wednesday and return on a Wednesday

Cheap 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 December 26, 2025.

This Delta deal was found by Cheapflights users on 12/23. 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 12/247:39 amTYS - SAT
1 stop8h 32mDelta
Thu 12/252:51 pmSAT - TYS
1 stop7h 22mDelta
Deal found 12/23$217
This Frontier deal was found by Cheapflights users on 12/24. 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 12/304:46 pmTYS - SAT
1 stop8h 31mFrontier
Mon 1/56:45 amSAT - TYS
1 stop8h 06mFrontier
Deal found 12/24$313
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/304:46 pmTYS - SAT
2 stops41h 37mMultiple Airlines
Sat 1/3110:35 amSAT - TYS
1 stop21h 04mMultiple Airlines
Deal found 12/24$342
This American Airlines deal was found by Cheapflights users on 12/24. 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 12/305:00 amTYS - SAT
1 stop5h 18mAmerican Airlines
Sat 1/318:10 amSAT - TYS
1 stop7h 39mAmerican Airlines
Deal found 12/24$350
This American Airlines deal was found by Cheapflights users on 12/23. 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 12/241:24 pmTYS - SAT
2 stops8h 17mAmerican Airlines
Thu 12/258:21 amSAT - TYS
1 stop6h 18mAmerican Airlines
Deal found 12/23$355
This American Airlines deal was found by Cheapflights users on 12/25. 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.
Fri 12/266:20 pmTYS - SAT
1 stop5h 39mAmerican Airlines
Sat 12/276:00 amSAT - TYS
1 stop4h 28mAmerican Airlines
Deal found 12/25$364
This Delta deal was found by Cheapflights users on 12/25. 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.
Fri 12/266:59 pmTYS - SAT
1 stop6h 39mDelta
Thu 1/15:10 amSAT - TYS
1 stop4h 21mDelta
Deal found 12/25$384
This Delta deal was found by Cheapflights users on 12/26. 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.
Fri 12/266:59 pmTYS - SAT
1 stop6h 39mDelta
Sun 12/286:22 pmSAT - TYS
1 stop4h 11mDelta
Deal found 12/26$399
This United Airlines deal was found by Cheapflights users on 12/25. 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 12/276:45 amTYS - SAT
1 stop6h 29mUnited Airlines
Thu 1/15:59 pmSAT - TYS
1 stop4h 43mUnited Airlines
Deal found 12/25$454

Find 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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$217
(American Airlines)

One-way from

$109
(Delta)

Popular in

October

Cheapest in

July

Average price

$388
Provider with most accurate pricing for Knoxville McGhee Tyson-San Antonio flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-San Antonio flights.
Search Deals
From Knoxville McGhee Tyson to San Antonio
Search Deals
One-way flight from Knoxville McGhee Tyson to San Antonio
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 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 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 December 26, 2025.
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

12:21 pm-4:50 pm

1 stop5h 29m

San Antonio

Sat 1/24

4:40 pm-10:47 pm

1 stop5h 07m

$217

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 1/28

4:41 pm-8:50 pm

1 stop5h 09m

San Antonio

Wed 2/18

8:30 am-3:40 pm

1 stop6h 10m

$217

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 2/25

4:04 pm-11:10 pm

1 stop8h 06m

San Antonio

Thu 2/26

6:00 am-3:41 pm

1 stop8h 41m

$226

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Mon 2/2

2:37 pm-8:25 pm

1 stop6h 48m

San Antonio

Thu 2/5

5:20 am-11:08 am

1 stop4h 48m

$235

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Tue 2/24

6:45 am-3:38 pm

2 stops9h 53m

San Antonio

Sat 2/28

2:24 pm-7:55 pm

1 stop4h 31m

$244

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Fri 2/27

9:36 pm-9:30 am

1 stop12h 54m

San Antonio

Sun 3/1

8:24 pm-6:31 pm

1 stop21h 07m

$250

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

5:20 am-11:08 am

1 stop4h 48m

$252

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sun 1/25

6:41 pm-12:38 am

1 stop6h 57m

San Antonio

Wed 1/28

8:00 am-3:21 pm

1 stop6h 21m

$268

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sun 1/18

5:40 am-10:13 am

1 stop5h 33m

$109

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Thu 1/1

7:39 am-3:11 pm

1 stop8h 32m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 14 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 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 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 December 19, 2025.

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 December is currently the most expensive (average of $120). 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 SAT?

Find hourly flight availability from Knoxville to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 26, 2025.

It’s optimal to fly from Knoxville to San Antonio in the evening. By choosing this option you can save up to 18% on the cost of your flight, compared to a flight in the morning.

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 December 26, 2025.
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
8,013 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

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
8,013 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

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
9,115 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

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
11,062 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

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 5h 29m. 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 $248 and $248 round-trip. Delta is 39% 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), United Airlines ($198), and American Airlines ($200).

  • 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 December is currently the most expensive (average of $120). 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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$207Average$309FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$248Average$367FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$340FlexibilityNo cancel feeOn-time71%

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