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Cheap flights from Knoxville to Puerto Rico from $138

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 Puerto Rico departing on 3/9. 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

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Find the cheapest flights from Knoxville to Puerto Rico

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:56 pm - 1:05 am
TYS
-
SJU
30h 09m
1 stop
Multiple Airlines Logo
6:00 am - 12:09 pm
SJU
-
TYS
31h 09m
1 stop
$242Multiple Airlines
Sun, Feb 22 - Sat, Feb 28
Multiple Airlines Logo
5:56 pm - 1:05 am
TYS
-
SJU
30h 09m
1 stop
Multiple Airlines Logo
6:00 am - 12:09 pm
SJU
-
TYS
31h 09m
1 stop
$243Multiple Airlines
Sun, Feb 22 - Sat, Feb 28
Multiple Airlines Logo
7:00 am - 2:25 am
TYS
-
SJU
18h 25m
1 stop
Multiple Airlines Logo
3:30 pm - 12:02 pm
SJU
-
TYS
21h 32m
1 stop
$272Multiple Airlines
Sun, Mar 1 - Wed, Mar 4
Multiple Airlines Logo
7:21 pm - 2:25 pm
TYS
-
SJU
18h 04m
1 stop
Multiple Airlines Logo
3:30 pm - 12:02 pm
SJU
-
TYS
21h 32m
1 stop
$273Multiple Airlines
Mon, Mar 2 - Wed, Mar 4
Multiple Airlines Logo
1:52 pm - 2:25 pm
TYS
-
SJU
23h 33m
1 stop
Multiple Airlines Logo
3:30 pm - 12:02 pm
SJU
-
TYS
21h 32m
1 stop
$281Multiple Airlines
Sat, Feb 28 - Wed, Mar 4
Multiple Airlines Logo
9:36 pm - 5:32 pm
TYS
-
SJU
18h 56m
2 stops
Multiple Airlines Logo
7:00 am - 6:08 pm
SJU
-
TYS
12h 08m
1 stop
$285Multiple Airlines
Mon, Mar 2 - Sat, Mar 7
Multiple Airlines Logo
5:53 pm - 10:47 am
TYS
-
SJU
15h 54m
1 stop
Multiple Airlines Logo
7:00 am - 6:08 pm
SJU
-
TYS
12h 08m
1 stop
$300Multiple Airlines
Sun, Mar 1 - Sat, Mar 7
Multiple Airlines Logo
9:40 pm - 12:33 pm
TYS
-
SJU
14h 53m
1 stop
Multiple Airlines Logo
7:00 am - 5:30 pm
SJU
-
TYS
10h 30m
1 stop
$301Multiple Airlines
Thu, May 7 - Mon, May 11
Multiple Airlines Logo
5:56 pm - 1:05 am
TYS
-
SJU
30h 09m
1 stop
Multiple Airlines Logo
7:05 am - 8:18 pm
SJU
-
TYS
14h 13m
2 stops
$303Multiple Airlines
Sun, Feb 22 - Sat, Feb 28
Multiple Airlines Logo
2:06 pm - 2:53 am
TYS
-
SJU
11h 47m
1 stop
Multiple Airlines Logo
6:00 am - 9:00 pm
SJU
-
TYS
15h 00m
1 stop
$304Multiple Airlines
Mon, Mar 2 - Mon, Mar 9

United Airlines flights from Knoxville to Puerto Rico

Our best United Airlines deals on Knoxville to Puerto Rico flight tickets
United Airlines
Mar 3
TYS2:21 pmKnoxville McGhee Tyson
7h 01m
1 stop
SJU10:22 pmSan Juan Luis Munoz Marin Intl
Mar 10
SJU7:05 amSan Juan Luis Munoz Marin Intl
7h 45m
1 stop
TYS2:50 pmKnoxville McGhee Tyson
$381
United Airlines
Feb 7
TYS11:07 amKnoxville McGhee Tyson
8h 53m
1 stop
SJU9:00 pmSan Juan Luis Munoz Marin Intl
Feb 9
SJU7:45 amSan Juan Luis Munoz Marin Intl
11h 20m
1 stop
TYS6:05 pmKnoxville McGhee Tyson
$651
United Airlines
Feb 7
TYS9:30 amKnoxville McGhee Tyson
11h 52m
1 stop
SJU10:22 pmSan Juan Luis Munoz Marin Intl
Feb 9
SJU8:35 amSan Juan Luis Munoz Marin Intl
27h 22m
2 stops
TYS10:57 amKnoxville McGhee Tyson
$667

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 2/22

5:56 pm-1:05 am

1 stop30h 09m

San Juan Luis Munoz Marin Intl

Sat 2/28

6:00 am-12:09 pm

1 stop31h 09m

$242

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 2/22

5:56 pm-1:05 am

1 stop30h 09m

San Juan Luis Munoz Marin Intl

Sat 2/28

6:00 am-12:09 pm

1 stop31h 09m

$243

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 3/1

7:00 am-2:25 am

1 stop18h 25m

San Juan Luis Munoz Marin Intl

Wed 3/4

3:30 pm-12:02 pm

1 stop21h 32m

$272

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Mon 3/2

7:21 pm-2:25 pm

1 stop18h 04m

San Juan Luis Munoz Marin Intl

Wed 3/4

3:30 pm-12:02 pm

1 stop21h 32m

$273

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sat 2/28

1:52 pm-2:25 pm

1 stop23h 33m

San Juan Luis Munoz Marin Intl

Wed 3/4

3:30 pm-12:02 pm

1 stop21h 32m

$281

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Mon 3/2

9:36 pm-5:32 pm

2 stops18h 56m

San Juan Luis Munoz Marin Intl

Sat 3/7

7:00 am-6:08 pm

1 stop12h 08m

$285

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 3/1

5:53 pm-10:47 am

1 stop15h 54m

San Juan Luis Munoz Marin Intl

Sat 3/7

7:00 am-6:08 pm

1 stop12h 08m

$300

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Thu 5/7

9:40 pm-12:33 pm

1 stop14h 53m

San Juan Luis Munoz Marin Intl

Mon 5/11

7:00 am-5:30 pm

1 stop10h 30m

$301

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 2/22

5:56 pm-1:05 am

1 stop30h 09m

San Juan Luis Munoz Marin Intl

Sat 2/28

7:05 am-8:18 pm

2 stops14h 13m

$303

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Mon 3/2

2:06 pm-2:53 am

1 stop11h 47m

San Juan Luis Munoz Marin Intl

Mon 3/9

6:00 am-9:00 pm

1 stop15h 00m

$304

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Puerto Rico from

How to get the cheapest flight ticket from Knoxville to Puerto Rico

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 Puerto Rico?

If you don’t want to visit Puerto Rico in February, then you should wait until September to fly from Knoxville, when ticket prices are also cheap, with an average price of $440.

How far in advance should I book a flight to Puerto Rico?

You are more likely to see cheaper flights to Puerto Rico from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Puerto Rico for around $539 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Puerto Rico from Knoxville for as low as $382 on momondo.

Can stopping save me money on Knoxville to Puerto Rico flights?

You could potentially save up to 11% on your flight if you consider stops on a Knoxville to Puerto Rico flight.

Cheap Knoxville to Puerto Rico flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Puerto Rico

Fastest flight time

5h 18m

Direct flights

None
The fastest flight from Knoxville to Puerto Rico takes 5h 18m
There are no direct flights from Knoxville to Puerto Rico. There are no popular flight routes from Knoxville to Puerto Rico.
Search flight deals

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

    Prices for flights from Knoxville McGhee Tyson Airport to Puerto Rico were last updated today.

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

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Puerto Rico?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Puerto Rico.

  • What documentation or ID do you need to fly to Puerto Rico?

    The travel and health documents required for your trip to Puerto Rico can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Puerto Rico. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Knoxville to Puerto Rico

Compare and see reviews for airlines that fly from Knoxville to Puerto Rico with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $335Free CancellationRating
7.9
8,159 reviews
Search Delta flights
American AirlinesPriceFrom $385Free CancellationRating
7.2
11,246 reviews
Search American Airlines flights
United AirlinesPriceFrom $435Free CancellationRating
7.4
9,244 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Puerto Rico?

Finding the right flight to Puerto Rico from Knoxville is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Puerto Rico quick and easy, saving you time and money.

Can I find flights from Knoxville to Puerto Rico with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Puerto Rico from Knoxville with this policy.

How can momondo help me find flights from Knoxville to Puerto Rico?

momondo provides multiple filters to help you find the best flight to Puerto Rico from Knoxville. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Knoxville to Puerto Rico flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Puerto Rico 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
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Find better results for your trip to Puerto Rico

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