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San Juan

$137+ Cheap flights from Knoxville (TYS) to San Juan

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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SJU
Oct 28 — Nov 41
Tue 10/28
Tue 11/4
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to San Juan are usually found in February or September, booked 89 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Knoxville to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to San Juan (PR1). 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 September 28, 2025.

Round-trip from

$345
(Kiwi.com)

One-way from

$137
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$440
From Knoxville McGhee Tyson to San Juan
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One-way flight from Knoxville McGhee Tyson to San Juan
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Highest demand for flights based on searches. 7% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Knoxville to San Juan

Cheapest flights from Knoxville to San Juan
Explore the most affordable flight options available from Knoxville to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:10 amTYS - SJU
1 stop18h 52mMultiple Airlines
Sun 10/196:22 amSJU - TYS
2 stops52h 11mMultiple Airlines
Deal found 9/26$345
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Sun 10/199:01 pmTYS - SJU
1 stop18h 15mMultiple Airlines
Sun 10/269:06 pmSJU - TYS
2 stops22h 26mMultiple Airlines
Deal found 9/27$356
This American Airlines deal was found by Cheapflights users on 9/25. 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.
Sat 11/158:04 pmTYS - SJU
1 stop16h 09mAmerican Airlines
Tue 11/186:42 pmSJU - TYS
1 stop6h 17mAmerican Airlines
Deal found 9/25$365
This Kiwi.com deal was found by Cheapflights users on 9/27. 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 10/157:15 amTYS - SJU
1 stop18h 47mMultiple Airlines
Tue 10/212:49 amSJU - TYS
2 stops42h 18mMultiple Airlines
Deal found 9/27$375
This Kiwi.com deal was found by Cheapflights users on 9/27. 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 10/184:26 pmTYS - SJU
1 stop18h 30mMultiple Airlines
Sat 10/253:19 pmSJU - TYS
2 stops29h 48mMultiple Airlines
Deal found 9/27$407
This Kiwi.com deal was found by Cheapflights users on 9/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:23 pmTYS - SJU
2 stops30h 34mMultiple Airlines
Sat 12/203:59 amSJU - TYS
1 stop18h 57mMultiple Airlines
Deal found 9/26$413
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:10 amTYS - SJU
1 stop18h 52mMultiple Airlines
Wed 10/153:19 pmSJU - TYS
2 stops29h 48mMultiple Airlines
Deal found 9/25$416

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to San Juan 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 September 28, 2025.
Use the filters below to find and compare flights from Knoxville to San Juan that are best for you.

Fly from

Knoxville

Fly to

San Juan

Route

Depart

Return

Price

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 10/19

9:01 pm-3:16 pm

1 stop18h 15m

San Juan Luis Munoz Marin Intl

Sun 10/26

9:06 pm-7:32 pm

2 stops22h 26m

$356

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sat 11/15

8:04 pm-1:13 pm

1 stop16h 09m

San Juan Luis Munoz Marin Intl

Tue 11/18

6:42 pm-11:59 pm

1 stop6h 17m

$365

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sat 10/11

7:10 am-2:02 am

1 stop18h 52m

San Juan Luis Munoz Marin Intl

Wed 10/15

3:19 pm-9:07 pm

2 stops29h 48m

$416

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sat 10/18

4:26 pm-11:13 am

2 stops18h 47m

San Juan Luis Munoz Marin Intl

Sat 10/25

3:19 pm-8:25 pm

3 stops29h 06m

$418

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sat 11/1

12:52 pm-11:55 pm

1 stop11h 03m

San Juan Luis Munoz Marin Intl

Sat 11/8

11:13 am-4:26 pm

1 stop6h 13m

$455

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 11/16

10:50 am-8:58 pm

1 stop9h 08m

San Juan Luis Munoz Marin Intl

Thu 11/20

8:00 am-4:38 pm

1 stop9h 38m

$485

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 10/19

9:01 pm-3:16 pm

1 stop18h 15m

$137

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Fri 10/24

7:15 am-2:02 am

1 stop18h 47m

$180

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sat 10/25

10:53 am-2:59 pm

2 stops28h 06m

$187

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 2/15

4:18 pm-10:35 pm

1 stop5h 17m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Showing 1-10 of 12 results
1
2

Best time to book a flight from Knoxville to San Juan

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

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

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to San Juan. Price data was last updated on September 26, 2025.

To ensure you get the cheapest price possible for a flight from Knoxville to San Juan, you should look to book at least 89 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 Juan?

Currently, September is the cheapest month in which you can book a flight from Knoxville to San Juan (average of $254). Flying from Knoxville to San Juan in June is currently the most expensive (average of $339). 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 SJU?

Find hourly flight availability from Knoxville to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Knoxville to San Juan in the evening. If you’re flexible enough to do this you can expect to save up to 45% on your trip compared to booking a flight at noon.

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

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

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

How much does it cost to fly round-trip from Knoxville to San Juan?

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. 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 Juan. Reviews last updated September 28, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Knoxville to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
8,925 reviews
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
7,973 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

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 Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Knoxville to San Juan?

    If you book a flight to San Juan from Knoxville, you will be flying from McGhee Tyson, which is the city’s only airport. Knoxville McGhee Tyson (TYS) is located 11.3 mi from the center of Knoxville. There are 0 flights from McGhee Tyson to San Juan per day from 3 different airlines.

  • How long is the flight from Knoxville to San Juan?

    For as low as $365, American Airlines can have you in San Juan from Knoxville in 16h 09m. The distance between Knoxville and San Juan is about 1625 mi.

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

    Currently priced at $334, Delta will fly you from Knoxville to San Juan and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $353 and $379, respectively. These flights start at 36% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Knoxville to San Juan (average of $254). Flying from Knoxville to San Juan in June is currently the most expensive (average of $339). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Knoxville to San Juan

Discover the top 3 airlines that operate flights from Knoxville to San Juan. 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 September 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$334Average$516FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$353Average$635FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$379Average$552FlexibilityNo cancel feeOn-time71%

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