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$137+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SAT
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to San Antonio are usually found in January or July, booked 67 days in advance, depart on a Friday or Wednesday and return on a Wednesday

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 July 3, 2025.

Round-trip from

$233
(American Airlines)

One-way from

$137
(Delta)

Popular in

March

Cheapest in

January

Average price

$270
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. 10% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/1. 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 9/176:00 amTYS - SAT
1 stop5h 55mAmerican Airlines
Mon 9/227:08 amSAT - TYS
1 stop6h 31mAmerican Airlines
Deal found 7/1$233
This Delta deal was found by Cheapflights users on 7/1. 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 9/175:45 amTYS - SAT
1 stop4h 47mDelta
Tue 9/235:10 amSAT - TYS
1 stop5h 31mDelta
Deal found 7/1$237
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/88:52 amTYS - SAT
1 stop14h 50mMultiple Airlines
Sun 8/107:10 amSAT - TYS
1 stop11h 54mMultiple Airlines
Deal found 6/30$247
This United Airlines deal was found by Cheapflights users on 7/1. 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 7/212:00 pmTYS - SAT
1 stop4h 32mUnited Airlines
Fri 7/116:45 amSAT - TYS
1 stop5h 36mUnited Airlines
Deal found 7/1$263

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 July 3, 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

Wed 9/17

6:00 am-10:55 am

1 stop5h 55m

San Antonio

Mon 9/22

8:00 am-3:41 pm

1 stop6h 41m

$233

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 9/17

5:45 am-9:32 am

1 stop4h 47m

San Antonio

Tue 9/23

5:10 am-11:41 am

1 stop5h 31m

$237

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Fri 8/8

8:52 am-10:42 pm

1 stop14h 50m

San Antonio

Sun 8/10

7:10 am-8:04 pm

1 stop11h 54m

$247

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 9/17

7:00 am-3:26 pm

2 stops9h 26m

San Antonio

Mon 9/22

4:22 pm-11:44 pm

1 stop6h 22m

$344

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Tue 7/8

5:12 pm-10:18 pm

1 stop6h 06m

$137

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Fri 7/11

6:00 am-10:42 pm

2 stops17h 42m

$214

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Thu 7/10

7:00 am-5:42 pm

2 stops11h 42m

$280

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Tue 7/8

6:00 am-9:13 am

1 stop4h 13m

$295

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Thu 7/10

5:25 pm-9:30 am

2 stops17h 05m

$328

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 June 27, 2025.

To ensure you get the cheapest price possible for a flight from Knoxville to San Antonio, you should look to book at least 67 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, August is the cheapest month in which you can book a flight from Knoxville to San Antonio (average of $295). Flying from Knoxville to San Antonio in March is currently the most expensive (average of $376). 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 July 3, 2025.

It’s optimal to fly from Knoxville to San Antonio in the evening. By choosing this option you can save up to 19% on the cost of your flight, compared to a flight in the morning.

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

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

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

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 July 3, 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
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,970 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,845 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.9
Fair
3,284 reviews
Delta
8.0
Very good
7,970 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Our cheapest airline available from Knoxville to San Antonio is American Airlines. Our recent data shows that you can find tickets from as low as $233 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $237 and $344 round-trip. American Airlines is 31% 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 ($137), United Airlines ($280), and American Airlines ($295).

  • 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, August is the cheapest month in which you can book a flight from Knoxville to San Antonio (average of $295). Flying from Knoxville to San Antonio in March is currently the most expensive (average of $376). 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
New Braunfels

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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$207Average$311FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$233Average$319FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$270Average$443FlexibilityNo cancel feeOn-time69%

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