TYS - SJU

$139 Find Cheap Flights from Knoxville to San Juan

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to San Juan departing on 3/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to San Juan, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to San Juan, as well as popular online travel agencies
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$275
Typical prices: $577-$746
Multiple Airlines
Sun 3/1Sat 3/7
TYS - SJU • 1 stop
Cheapest one-way
$139
Overall average: $318
Multiple Airlines
Mon 3/30
TYS - SJU • 1 stop
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 5% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 21% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Knoxville to San Juan (TYS-SJU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Knoxville to San Juan

Sun, Mar 1 - Sat, Mar 7
Multiple Airlines Logo
7:00 am - 2:25 am
TYS
-
SJU
18h 25m
1 stop
Multiple Airlines Logo
7:00 am - 6:08 pm
SJU
-
TYS
12h 08m
1 stop
$275Multiple Airlines
Tue, Apr 7 - Thu, Apr 16
Multiple Airlines Logo
2:56 pm - 11:49 am
TYS
-
SJU
20h 53m
1 stop
Multiple Airlines Logo
6:00 am - 8:42 pm
SJU
-
TYS
14h 42m
1 stop
$282Multiple Airlines
Sun, Mar 1 - Sat, Mar 7
Multiple Airlines Logo
5:53 pm - 6:58 pm
TYS
-
SJU
48h 05m
2 stops
Multiple Airlines Logo
7:00 am - 6:08 pm
SJU
-
TYS
12h 08m
1 stop
$283Multiple Airlines
Wed, Mar 18 - Tue, Mar 24
Multiple Airlines Logo
11:30 am - 6:55 pm
TYS
-
SJU
7h 25m
1 stop
Multiple Airlines Logo
7:54 pm - 10:40 am
SJU
-
TYS
14h 46m
1 stop
$286Multiple Airlines
Mon, Apr 6 - Thu, Apr 16
Multiple Airlines Logo
9:00 am - 11:49 am
TYS
-
SJU
26h 49m
1 stop
Multiple Airlines Logo
6:00 am - 8:42 pm
SJU
-
TYS
14h 42m
1 stop
$287Multiple Airlines
Thu, Mar 5 - Sun, Mar 8
Multiple Airlines Logo
6:30 am - 3:00 pm
TYS
-
SJU
7h 30m
1 stop
Multiple Airlines Logo
5:30 am - 10:11 pm
SJU
-
TYS
16h 41m
1 stop
$296Multiple Airlines
Thu, Mar 5 - Wed, Mar 11
Multiple Airlines Logo
6:30 am - 3:00 pm
TYS
-
SJU
7h 30m
1 stop
Multiple Airlines Logo
6:30 am - 10:44 am
SJU
-
TYS
28h 14m
2 stops
$297Multiple Airlines
Thu, Mar 5 - Wed, Mar 11
Multiple Airlines Logo
6:30 am - 3:00 pm
TYS
-
SJU
7h 30m
1 stop
Multiple Airlines Logo
8:11 pm - 10:44 am
SJU
-
TYS
14h 33m
1 stop
$301Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
Multiple Airlines Logo
2:56 pm - 11:49 am
TYS
-
SJU
20h 53m
1 stop
Multiple Airlines Logo
7:54 pm - 10:36 am
SJU
-
TYS
14h 42m
1 stop
$305Multiple Airlines
Thu, Mar 5 - Sun, Mar 8
Multiple Airlines Logo
6:30 am - 3:00 pm
TYS
-
SJU
7h 30m
1 stop
Multiple Airlines Logo
5:30 am - 10:11 pm
SJU
-
TYS
16h 41m
1 stop
$309Multiple Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to San Juan flights

Get data-powered insights and trends into flights from Knoxville to San Juan to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Knoxville to San Juan Luis Munoz Marin Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Knoxville to San Juan Luis Munoz Marin Intl Airport departing in March.

What is the cheapest month to fly from Knoxville to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Knoxville to San Juan Luis Munoz Marin Intl Airport is September, where tickets cost $441 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $702 and $660 respectively.

How far in advance should I book a flight from Knoxville to San Juan Luis Munoz Marin Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Knoxville to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Knoxville to San Juan Luis Munoz Marin Intl Airport, you should book around 4 weeks before departure, which saves you about 5% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$139
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Knoxville to San Juan

When to book flights from Knoxville to San Juan

Are your dates flexible? Find out the best times to travel from Knoxville to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Knoxville to San Juan flights

  • What is the cheapest flight from Knoxville to San Juan Luis Munoz Marin Intl Airport?

    In the last 3 days, the lowest price for a flight from Knoxville to San Juan Luis Munoz Marin Intl Airport was $139 for a one-way ticket and $275 for a round-trip.

  • Do I need a passport to fly between Knoxville and San Juan?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Knoxville and on arrival in San Juan.

  • Which aircraft models fly most regularly from Knoxville to San Juan?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Knoxville to San Juan?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Knoxville and San Juan, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Knoxville to San Juan, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Knoxville to San Juan are Southwest and Delta. With an average price for the route of $486 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $559 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Knoxville to San Juan?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Knoxville to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Knoxville to San Juan?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Knoxville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Knoxville to San Juan?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Knoxville with another airline. Booking your flights between Knoxville and SJU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Knoxville to San Juan?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Knoxville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Knoxville to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Knoxville to San Juan? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4283 reviews
7.5Entertainment
7.0Food
8.0Comfort
8.6Crew
8.1Boarding
Airline reviews

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

2.0 MediocreMike, Feb 2026
LAS - OKC
Read more Southwest reviews

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

My flight from Denver to Minneapolis was excellent. My flight from Minneapolis to Denver was one of the worst I flights I have ever experienced. I had a window seat, the gentleman in the middle seat was morbidly obese and SW should have made him purchase two seats. His elbow dug into my arm most of the way even after I asked to please be careful. I was literally squashed between the him and the window with no wiggle room. The plane was full so it was not possible to ask for a different seat. I realize I should have complained to the flight attendant but I didn't feel anything could be done to rectify the situation. I fly SW often, I will continue to do so as this was my first negative experience.

I was assigned seat 7E, yet my boarding was Group 5, which caused me to have to put my luggage in the back of the plance above `19 or 20 aisle, as passengers who had boarded earlier took the overhead bins in the front. SW needs to monitor bin space and ensure that bin space above the seat are aligned to those sitting near their seats. Also the seating assignments needs to align with group number. Maybe board those last first and so on? Having said the ALL the passengers on the plane were gracious enough to allow me and other passengers in this dilema to retrieve our luggage and helped us along the way. I always love the flight staff, as always their fantastic and I can't rave about them enough!

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The gate agent was most helpful in getting me on to fly standby. I greatly appreciate it.

bulkhead seat had very little legroom - even in bsiness class.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Sorry I didn't realize I was writing a review for each leg. Please see my previous review - it applies to the entire flight, not just a single leg.

This is the first time I've been disappointed with Delta. I was called by Delta to see if I would volunteer to change flights since my original flight home was overbooked. I accepted. The modified booking only provided me a 35 minute layover - when you subtract the fact that boarding closes for a flight 15 minutes early, that gave me 20 minutes to run for one end of the airport to the other. I barely made it. On the 2.5 hour flight to Tampa, the crew repeatedly let us know over the intercom that they cannot serve drinks or snacks due to safety/turbulence. I would have accepted this reason if they did not CONTINUALLY SERVE DRINKS AND COOKED FOOD to First class. If safety is the excuse then the entire plane should be strapped in for safety. On top of this the air conditioning vents were not working correctly and the plane was uncomfortably warm. I love Delta and am a loyal Delta traveler, and I have never had an experience like this. I don't know if there's a disconnect between availability among third-party sites like KAYAK and the airlines or what, but when overbooking causes issues like this for travelers it should be reviewed and changes to the booking process should be made. I blame BOTH KAYAK and Delta for this terrible experience.

boarded at 5:30 pm, pushed away from gate at 6pm ... takeoff was not until ~6:45pm; disappointing

Smooth boarding, pleasant and professional lady checking us in. Crew service was excellent, again pleasant, but professional. Nice touch-down on landing! Thank you Delta. 💗

Originally, I was booked in economy. I paid several hundred additional dollars to upgrade to first class. Then I paid several more hundred dollars to change my flight to a slightly earlier flight. I asked if the changed flight would also seat me in first class, and I was told that it would. When I boarded the plane, however, I was seated in economy. So, I paid $500-600 more than I paid for my original ticket for an upgrade and a changed flight - received the changed flight (which was nice), but did not receive the upgrade. So, I was not completely satisfied.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Paid for wifi that didn't work. No plug in seat to work. No entertainment.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Check-in and in-flight staff were better than average. The seat was a fair size but too hard and not enough padding. The cushion/pillow provided is poor (thin and seems to be disposable ,it provides no effective cushioning or support). Food was OK-ish but no choice of inflight snacks and no easy place to get drinks other than water (I could ask for juice by intruding into the staff area at the back of the plane) Entertainment was very good actually. Overall better than I expected from a US-based airline (sorry!) but compared to ANA or Singapore it was so-so. (I live in Japan so they are my comparative airlines)

Everything was on time Will use united again for sure

Plane outlets in my row not working to charge phone. Staff response was, well it should be. Plug into seed for volume not working well. Had to find the sweet spot for plug in or it would shut off and on.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

The seats are too uncomfortable for anyone over 5ft 8in. I'm 5'10" with a back and hip issue and I was in pai for the full duration of the flight.

The flight was on time/early, attentive crew, and everything overall went smoothly. Disappointed that WIFI was not working for the flight.

One day, I do so hope for a gluten free snack! Seems like with the rest of the world FINALLY figuring out what gluten free is, American Airlines would too. Fingers crossed!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

Flight was on time and the meal and service were good.

The accessible bathroom should be visible to people in Economy class.

Flight was delayed for 2 hours, then last minute the change to on time. The satélite location is far and a nightmare to get to.

This was a horrible experience. I’ve experienced several delays at this point and still not home. I was supposed to be home by 8:30 last night and here I sit at 7 am on a plane STILL unable to go home because of American Airlines.

Lexus in first class was absolutely amazing! Beat flight attendant i’ve ever seen.

Generally good. Flight left on time and the seats are comfortable. Plenty of space in front if you in you choose a comfort plus seat, completely worth spending the extra money given the amount of hours the flight lasts. The food tastes good but I would say it’s a the amount is too little. The crew was friendly and efficient. There was a some turbulence at different points into the flight. American Airlines has good deals to NZ if you book with plenty of time before you plan on going.

Everything you need to know for your flight from Knoxville to San Juan

Information on your arrival and departure airports