Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Knoxville to San Antonio from $88

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to San Antonio departing on 9/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Knoxville to San Antonio

Cheap round-trip flights

Frontier Logo
8:17 pm - 4:37 pmTYS-SAT
21h 20m1 stop
Frontier Logo
8:26 pm - 7:32 pmSAT-TYS
22h 06m1 stop
$179Frontier
Find Deal
Fri, Oct 17 - Sun, Oct 19
Frontier Logo
8:17 pm - 3:14 pmTYS-SAT
19h 57m1 stop
Frontier Logo
8:26 pm - 7:32 pmSAT-TYS
22h 06m1 stop
$211Frontier
Find Deal
Mon, Oct 20 - Thu, Oct 23
American Airlines Logo
5:05 am - 10:21 amTYS-SAT
6h 16m1 stop
American Airlines Logo
7:08 am - 2:39 pmSAT-TYS
6h 31m1 stop
$233American Airlines
Find Deal
Wed, Sep 17 - Mon, Sep 22
Delta Logo
7:45 am - 2:35 pmTYS-SAT
7h 50m1 stop
Delta Logo
2:55 pm - 11:07 pmSAT-TYS
7h 12m1 stop
$237Delta
Find Deal
Sat, Oct 11 - Sat, Oct 18
American Airlines Logo
2:23 pm - 5:41 pmTYS-SAT
4h 18m1 stop
American Airlines Logo
7:22 am - 1:43 pmSAT-TYS
5h 21m1 stop
$238American Airlines
Find Deal
Sat, Aug 30 - Wed, Sep 3
Delta Logo
6:14 pm - 11:57 pmTYS-SAT
6h 43m1 stop
Delta Logo
5:45 pm - 11:44 pmSAT-TYS
4h 59m1 stop
$254Delta
Find Deal
Thu, Sep 4 - Sat, Sep 13
Logo
9:01 pm - 3:55 pmTYS-SAT
19h 54m2 stops
Logo
6:00 am - 1:23 pmSAT-TYS
30h 23m1 stop
$340
Find Deal
Sun, Oct 19 - Thu, Oct 23
Logo
9:00 am - 6:15 pmTYS-SAT
10h 15m1 stop
Logo
8:26 pm - 12:18 pmSAT-TYS
14h 52m2 stops
$349
Find Deal
Mon, Oct 20 - Thu, Oct 23
United Airlines Logo
7:00 am - 3:26 pmTYS-SAT
9h 26m2 stops
United Airlines Logo
11:45 am - 10:45 pmSAT-TYS
10h 00m2 stops
$384United Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
10:51 am - 9:29 pmTYS-SAT
11h 38m2 stops
United Airlines Logo
2:25 pm - 7:52 pmSAT-TYS
4h 27m1 stop
$397United Airlines
Find Deal
Sat, Oct 11 - Sat, Oct 18

United Airlines flights from Knoxville to San Antonio

Our best United Airlines deals on Knoxville to San Antonio flight tickets
United Airlines
Sep 13
TYS7:00 amKnoxville McGhee Tyson
9h 26m
2 stops
SAT3:26 pmSan Antonio
Sep 20
SAT11:45 amSan Antonio
10h 00m
2 stops
TYS10:45 pmKnoxville McGhee Tyson
$384
Find similar
United Airlines
Oct 11
TYS10:51 amKnoxville McGhee Tyson
11h 38m
2 stops
SAT9:29 pmSan Antonio
Oct 18
SAT2:25 pmSan Antonio
4h 27m
1 stop
TYS7:52 pmKnoxville McGhee Tyson
$397
Find similar
United Airlines
Sep 17
TYS2:00 pmKnoxville McGhee Tyson
9h 48m
2 stops
SAT10:48 pmSan Antonio
Sep 22
SAT9:50 amSan Antonio
7h 20m
1 stop
TYS6:10 pmKnoxville McGhee Tyson
$448
Find similar

Frontier flights from Knoxville to San Antonio

Our best Frontier deals on Knoxville to San Antonio flight tickets
Frontier
Oct 17
TYS8:17 pmKnoxville McGhee Tyson
21h 20m
1 stop
SAT4:37 pmSan Antonio
Oct 19
SAT8:26 pmSan Antonio
22h 06m
1 stop
TYS7:32 pmKnoxville McGhee Tyson
$179
Find similar
Frontier
Oct 20
TYS8:17 pmKnoxville McGhee Tyson
19h 57m
1 stop
SAT3:14 pmSan Antonio
Oct 23
SAT8:26 pmSan Antonio
22h 06m
1 stop
TYS7:32 pmKnoxville McGhee Tyson
$211
Find similar
Frontier
Oct 19
TYS8:17 pmKnoxville McGhee Tyson
24h 18m
1 stop
SAT7:35 pmSan Antonio
Oct 23
SAT8:26 pmSan Antonio
22h 06m
1 stop
TYS7:32 pmKnoxville McGhee Tyson
$319
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 17, 2025.
Use the filters below to find and compare flights from Knoxville to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Fri 10/17

8:17 pm-4:37 pm

1 stop21h 20m

San Antonio

Sun 10/19

8:26 pm-7:32 pm

1 stop22h 06m

$179

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Mon 10/20

8:17 pm-3:14 pm

1 stop19h 57m

San Antonio

Thu 10/23

8:26 pm-7:32 pm

1 stop22h 06m

$211

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Wed 9/17

5:05 am-10:21 am

1 stop6h 16m

San Antonio

Mon 9/22

7:08 am-2:39 pm

1 stop6h 31m

$233

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sat 10/11

7:45 am-2:35 pm

1 stop7h 50m

San Antonio

Sat 10/18

2:55 pm-11:07 pm

1 stop7h 12m

$237

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sat 8/30

2:23 pm-5:41 pm

1 stop4h 18m

San Antonio

Wed 9/3

7:22 am-1:43 pm

1 stop5h 21m

$238

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Thu 9/4

6:14 pm-11:57 pm

1 stop6h 43m

San Antonio

Sat 9/13

5:45 pm-11:44 pm

1 stop4h 59m

$254

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sun 10/19

9:01 pm-3:55 pm

2 stops19h 54m

San Antonio

Thu 10/23

6:00 am-1:23 pm

1 stop30h 23m

$340

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Mon 10/20

9:00 am-6:15 pm

1 stop10h 15m

San Antonio

Thu 10/23

8:26 pm-12:18 pm

2 stops14h 52m

$349

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sat 9/13

7:00 am-3:26 pm

2 stops9h 26m

San Antonio

Sat 9/20

11:45 am-10:45 pm

2 stops10h 00m

$384

KnoxvilleSan Antonio

TYS - SAT

TYSSAT

Knoxville McGhee Tyson

Sat 10/11

10:51 am-9:29 pm

2 stops11h 38m

San Antonio

Sat 10/18

2:25 pm-7:52 pm

1 stop4h 27m

$397

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to San Antonio from

How to get the cheapest flight ticket from Knoxville to San Antonio

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of July, then book flights to San Antonio from Knoxville during January instead. Flights to San Antonio in January, while not as cheap as those in July, still average around $268.

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Friday when prices can be found for as low as $284. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $480.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is in the evening. momondo users have found flights departing from Knoxville to San Antonio in the evening for as low as $279. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $343. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to San Antonio?

You are more likely to see cheaper flights to San Antonio from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $350 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Knoxville for as low as $257 on momondo.

How have Knoxville to San Antonio flight prices changed over time?

As of August 2025, prices for Knoxville to San Antonio flights are approximately 67% cheaper when compared to flights at the same time last year.

When to book flights from Knoxville to San Antonio

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to San Antonio according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Knoxville to San Antonio (TYS to SAT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to San Antonio

Best Price Found

$88

Fastest flight time

4h 18m

Direct flights

None

Airports in San Antonio

1 airport
The best one-way flight to San Antonio from Knoxville in the past 72 hours is $88. The best round-trip flight deal from Knoxville to San Antonio found on momondo in the last 72 hours is $179.
The fastest flight from Knoxville to San Antonio takes 4h 18m
There are no direct flights from Knoxville to San Antonio. Popular non-direct route for this connection is Knoxville McGhee Tyson Airport - San Antonio Airport.
There is 1 airport near San Antonio: San Antonio (SAT)
Search flight deals

  • How far is Knoxville McGhee Tyson to San Antonio by plane?

    San Antonio is 958.1 mi away from Knoxville McGhee Tyson. In terms of flight time, this usually takes a little over 4h 18m.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to San Antonio Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to San Antonio Airport are updated daily.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to San Antonio Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to San Antonio Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to San Antonio Airport.

  • What documentation or ID do you need to fly to San Antonio Airport?

    The required travel and health documents for your San Antonio Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Antonio Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Knoxville to San Antonio?

Best airlines flying from Knoxville to San Antonio

Compare and see reviews for airlines that fly from Knoxville to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $207Free CancellationRating
8.0
7,986 reviews
Search Delta flights
American AirlinesPriceFrom $244Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $270Free CancellationRating
7.4
8,919 reviews
Search United Airlines flights

Traveling to a place near San Antonio?

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

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to San Antonio?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Antonio from Knoxville.

Can I find flights from Knoxville to San Antonio with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to San Antonio flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to San Antonio?

momondo helps you find the best flight between Knoxville and San Antonio by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Knoxville to San Antonio right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Antonio from Knoxville. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Antonio trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 8/22
Fri 8/29
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States