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Cheap flights from Knoxville to Puerto Rico from $172

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 1/3. 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
1:39 pm - 12:13 am
TYS
-
SJU
9h 34m1 stop
Multiple Airlines Logo
2:29 am - 5:28 pm
SJU
-
TYS
15h 59m2 stops
$255Multiple Airlines
Thu, Jan 8 - Sun, Jan 11
Multiple Airlines Logo
7:15 am - 4:22 pm
TYS
-
SJU
8h 07m1 stop
Multiple Airlines Logo
4:36 pm - 5:53 pm
SJU
-
TYS
26h 17m2 stops
$291Multiple Airlines
Mon, Feb 2 - Sat, Feb 7
Multiple Airlines Logo
7:15 am - 4:22 pm
TYS
-
SJU
8h 07m1 stop
Multiple Airlines Logo
6:20 pm - 8:39 am
SJU
-
TYS
15h 19m1 stop
$293Multiple Airlines
Mon, Feb 2 - Sat, Feb 7
Multiple Airlines Logo
1:39 pm - 12:13 am
TYS
-
SJU
9h 34m1 stop
Multiple Airlines Logo
10:33 am - 5:28 pm
SJU
-
TYS
7h 55m1 stop
$297Multiple Airlines
Thu, Jan 8 - Mon, Jan 12
Multiple Airlines Logo
7:22 pm - 11:58 am
TYS
-
SJU
15h 36m1 stop
Multiple Airlines Logo
2:57 pm - 5:53 pm
SJU
-
TYS
27h 56m1 stop
$301Multiple Airlines
Tue, Jan 6 - Sat, Jan 10
Multiple Airlines Logo
1:39 pm - 10:47 am
TYS
-
SJU
20h 08m1 stop
Multiple Airlines Logo
2:54 am - 10:08 am
SJU
-
TYS
56h 14m2 stops
$321Multiple Airlines
Sun, Feb 8 - Sat, Feb 14
Multiple Airlines Logo
1:39 pm - 10:47 am
TYS
-
SJU
20h 08m1 stop
Multiple Airlines Logo
6:00 am - 10:46 pm
SJU
-
TYS
17h 46m1 stop
$326Multiple Airlines
Sun, Feb 8 - Sun, Feb 15
Multiple Airlines Logo
6:00 am - 3:19 pm
TYS
-
SJU
32h 19m2 stops
Multiple Airlines Logo
9:23 pm - 5:28 pm
SJU
-
TYS
21h 05m1 stop
$329Multiple Airlines
Mon, Jan 5 - Sun, Jan 11
Multiple Airlines Logo
7:22 pm - 11:58 am
TYS
-
SJU
15h 36m1 stop
Multiple Airlines Logo
9:23 pm - 5:53 pm
SJU
-
TYS
21h 30m2 stops
$342Multiple Airlines
Tue, Jan 6 - Sat, Jan 10
Multiple Airlines Logo
7:15 am - 6:55 pm
TYS
-
SJU
10h 40m1 stop
Multiple Airlines Logo
9:23 pm - 5:28 pm
SJU
-
TYS
21h 05m1 stop
$344Multiple Airlines
Mon, Jan 5 - Sun, Jan 11

American Airlines flights from Knoxville to Puerto Rico

Our best American Airlines deals on Knoxville to Puerto Rico flight tickets
American Airlines
Feb 26
TYS5:00 amKnoxville McGhee Tyson
15h 33m
1 stop
SJU9:33 pmSan Juan Luis Munoz Marin Intl
Mar 6
SJU8:15 amSan Juan Luis Munoz Marin Intl
11h 17m
1 stop
TYS6:32 pmKnoxville McGhee Tyson
$365
Find similar
American Airlines
Feb 25
TYS10:17 amKnoxville McGhee Tyson
9h 19m
1 stop
SJU8:36 pmSan Juan Luis Munoz Marin Intl
Mar 7
SJU8:15 amSan Juan Luis Munoz Marin Intl
11h 17m
1 stop
TYS6:32 pmKnoxville McGhee Tyson
$390
Find similar
American Airlines
Jan 23
TYS6:00 amKnoxville McGhee Tyson
15h 26m
1 stop
SJU10:26 pmSan Juan Luis Munoz Marin Intl
Jan 26
SJU4:49 pmSan Juan Luis Munoz Marin Intl
8h 10m
1 stop
TYS11:59 pmKnoxville McGhee Tyson
$405
Find similar

Southwest flights from Knoxville to Puerto Rico

Our best Southwest deals on Knoxville to Puerto Rico flight tickets
Southwest
Apr 7
TYS12:50 pmKnoxville McGhee Tyson
8h 15m
1 stop
SJU9:05 pmSan Juan Luis Munoz Marin Intl
Apr 10
SJU10:00 amSan Juan Luis Munoz Marin Intl
8h 10m
1 stop
TYS6:10 pmKnoxville McGhee Tyson
$450
Find similar
Southwest
Apr 7
TYS8:15 amKnoxville McGhee Tyson
12h 50m
2 stops
SJU9:05 pmSan Juan Luis Munoz Marin Intl
Apr 10
SJU10:00 amSan Juan Luis Munoz Marin Intl
8h 10m
1 stop
TYS6:10 pmKnoxville McGhee Tyson
$460
Find similar
Southwest
Apr 7
TYS8:15 amKnoxville McGhee Tyson
12h 50m
2 stops
SJU9:05 pmSan Juan Luis Munoz Marin Intl
Apr 10
SJU5:35 amSan Juan Luis Munoz Marin Intl
12h 35m
2 stops
TYS6:10 pmKnoxville McGhee Tyson
$475
Find similar

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 December 22, 2025.
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

Thu 1/8

1:39 pm-12:13 am

1 stop9h 34m

San Juan Luis Munoz Marin Intl

Sun 1/11

2:29 am-5:28 pm

2 stops15h 59m

$255

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Mon 2/2

7:15 am-4:22 pm

1 stop8h 07m

San Juan Luis Munoz Marin Intl

Sat 2/7

4:36 pm-5:53 pm

2 stops26h 17m

$291

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Mon 2/2

7:15 am-4:22 pm

1 stop8h 07m

San Juan Luis Munoz Marin Intl

Sat 2/7

6:20 pm-8:39 am

1 stop15h 19m

$293

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Thu 1/8

1:39 pm-12:13 am

1 stop9h 34m

San Juan Luis Munoz Marin Intl

Mon 1/12

10:33 am-5:28 pm

1 stop7h 55m

$297

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Tue 1/6

7:22 pm-11:58 am

1 stop15h 36m

San Juan Luis Munoz Marin Intl

Sat 1/10

2:57 pm-5:53 pm

1 stop27h 56m

$301

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 2/8

1:39 pm-10:47 am

1 stop20h 08m

San Juan Luis Munoz Marin Intl

Sat 2/14

2:54 am-10:08 am

2 stops56h 14m

$321

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Sun 2/8

1:39 pm-10:47 am

1 stop20h 08m

San Juan Luis Munoz Marin Intl

Sun 2/15

6:00 am-10:46 pm

1 stop17h 46m

$326

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Mon 1/5

6:00 am-3:19 pm

2 stops32h 19m

San Juan Luis Munoz Marin Intl

Sun 1/11

9:23 pm-5:28 pm

1 stop21h 05m

$329

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Tue 1/6

7:22 pm-11:58 am

1 stop15h 36m

San Juan Luis Munoz Marin Intl

Sat 1/10

9:23 pm-5:53 pm

2 stops21h 30m

$342

KnoxvilleSan Juan

TYS - SJU

TYSSJU

Knoxville McGhee Tyson

Mon 1/5

7:15 am-6:55 pm

1 stop10h 40m

San Juan Luis Munoz Marin Intl

Sun 1/11

9:23 pm-5:28 pm

1 stop21h 05m

$344

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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.

What is the cheapest day to depart on your flight to Puerto Rico?

On average, the least expensive day to fly to Puerto Rico from Knoxville is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $445. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Puerto Rico is Friday, with ticket prices averaging around $579.

What is the cheapest time of day to depart on your flight to Puerto Rico?

Our most recent data shows that the best time of day to fly to Puerto Rico is in the evening. Flights from Knoxville to Puerto Rico during this time can be as low as $314. In contrast, the most expensive time of day to depart to Puerto Rico is at noon when prices are around $562.

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 $536 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.

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

7h 25m

Direct flights

None
The fastest flight from Knoxville to Puerto Rico takes 7h 25m
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
8,014 reviews
Search Delta flights
American AirlinesPriceFrom $365Free CancellationRating
7.2
11,052 reviews
Search American Airlines flights
United AirlinesPriceFrom $435Free CancellationRating
7.4
9,102 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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