$420+ Cheap flights from Knoxville to Springfield, IL (TYS - SPI)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/26. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SPI
Oct 10 — Oct 171
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Knoxville to Springfield with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Knoxville to Springfield
Cheapest
Best
Last-minute
One-way
Cheapest flights from Knoxville to SpringfieldExplore the most affordable flight options available from Knoxville to Springfield. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from Knoxville to Springfield. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/216:55 pm -
1 stop6h 14m
Sun 10/256:02 am -
1 stop4h 03m
Deal found 9/6![American Airlines logo]()
$528
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Sun 10/48:14 pm -
1 stop4h 53m
Sun 10/116:02 am -
2 stops8h 10m
Deal found 9/6![American Airlines logo]()
$777
Best flights from Knoxville to SpringfieldDiscover carefully curated flight deals from Knoxville to Springfield that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from Knoxville to Springfield that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/2111:35 am -
1 stop3h 54m
Sun 10/256:02 am -
2 stops9h 16m
Deal found 9/6![American Airlines logo]()
$533
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Sun 10/47:00 am -
2 stops8h 20m
Sun 10/116:02 am -
2 stops8h 10m
Deal found 9/6![American Airlines logo]()
$816
Last-minute flights from Knoxville to SpringfieldDiscover last-minute flight deals from Knoxville to Springfield. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Knoxville to Springfield. Data last updated September 10, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Sun 10/48:14 pm -
1 stop4h 53m
Sun 10/116:02 am -
2 stops8h 10m
Deal found 9/6![American Airlines logo]()
$777
This American Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 10/216:55 pm -
1 stop6h 14m
Sun 10/256:02 am -
1 stop4h 03m
Deal found 9/6![American Airlines logo]()
$528
One-way flights from Knoxville to SpringfieldSearch for one-way flight options from Knoxville to Springfield. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Knoxville to Springfield. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 12/268:30 am -
1 stop10h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Allegiant Air logo]()
$420
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Fri 12/257:00 am -
2 stops18h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![American Airlines logo]()
$451
This American Airlines deal was found by Cheapflights users on 9/5. 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 12/266:38 am -
2 stops8h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![American Airlines logo]()
$504
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Fri 12/259:15 am -
3 stops35h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$524
Find flight deals from Knoxville to Springfield
Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Springfield (SPI). 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 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $528 (American Airlines) |
One-way from | $420 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Knoxville to Springfield 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 7,457,451 searches. Data last updated September 10, 2026.
Use the filters below to find and compare flights from Knoxville to Springfield that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
KnoxvilleSpringfield
TYS Knoxville McGhee Tyson - SPI Springfield Capital
TYSSPI
Knoxville McGhee Tyson
Sat 12/26
8:30 am-6:24 pm
1 stop10h 54m
Springfield Capital
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$420
KnoxvilleSpringfield
TYS Knoxville McGhee Tyson - SPI Springfield Capital
TYSSPI
Knoxville McGhee Tyson
Fri 12/25
7:00 am-12:17 am
2 stops18h 17m
Springfield Capital
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$451
Quickest round-trip
KnoxvilleSpringfield
TYS Knoxville McGhee Tyson - SPI Springfield Capital
TYSSPI
Knoxville McGhee Tyson
Sat 12/26
6:38 am-2:28 pm
2 stops8h 50m
Springfield Capital
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$504
KnoxvilleSpringfield
TYS Knoxville McGhee Tyson - SPI Springfield Capital
TYSSPI
Knoxville McGhee Tyson
Fri 12/25
9:15 am-7:58 pm
3 stops35h 43m
Springfield Capital
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$524
KnoxvilleSpringfield
TYS Knoxville McGhee Tyson - SPI Springfield Capital
TYSSPI
Knoxville McGhee Tyson
Wed 10/21
11:35 am-2:29 pm
1 stop3h 54m
Springfield Capital
Sun 10/25
6:02 am-4:18 pm
2 stops9h 16m
$533
KnoxvilleSpringfield
TYS Knoxville McGhee Tyson - SPI Springfield Capital
TYSSPI
Knoxville McGhee Tyson
Sun 10/4
7:00 am-2:20 pm
2 stops8h 20m
Springfield Capital
Sun 10/11
6:02 am-3:12 pm
2 stops8h 10m
$816
Sorted by cheapest first
Compare providers for flights from Knoxville to Springfield
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Springfield in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Knoxville-Springfield, Illinois flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Springfield, Illinois flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Springfield, Illinois flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Knoxville-Springfield, Illinois flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Springfield, Illinois flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Knoxville to Springfield
Have a flexible travel schedule? Discover the best time to fly to Springfield from Knoxville with our price prediction graph.
TYS-SPI
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.
Related info for your journey
Find useful and relevant information for your journey from Knoxville to Springfield. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Springfield?
Book flights to Springfield if you plan to visit one of these locationsLincoln
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Knoxville
Popular flights
Springfield flight routes