Cheap flights To Knox (RFD) from $19

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Cheap Flights to Knox from $19 One Way, $48 Round Trip

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Thu, Dec 24 - Mon, Jan 4
FLL
Fort Lauderdale - Hollywood Intl.
ORD
O'Hare Intl.
$48 Roundtrip, found 2 days ago
$48
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Dec 24 from Fort Lauderdale - Hollywood Intl. to O'Hare Intl., returning Mon, Jan 4, priced at $48 found 2 days ago
Fri, Feb 26 - Mon, Mar 1
FLL
Fort Lauderdale - Hollywood Intl.
ORD
O'Hare Intl.
$54 Roundtrip, found 1 day ago
$54
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Feb 26 from Fort Lauderdale - Hollywood Intl. to O'Hare Intl., returning Mon, Mar 1, priced at $54 found 1 day ago
Fri, Jan 15 - Thu, Jan 21
FLL
Fort Lauderdale - Hollywood Intl.
ORD
O'Hare Intl.
$69 Roundtrip, found 6 days ago
$69
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Fri, Jan 15 from Fort Lauderdale - Hollywood Intl. to O'Hare Intl., returning Thu, Jan 21, priced at $69 found 6 days ago
Thu, Dec 3 - Mon, Dec 7
FLL
Fort Lauderdale - Hollywood Intl.
ORD
O'Hare Intl.
$75 Roundtrip, found 7 hours ago
$75
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Dec 3 from Fort Lauderdale - Hollywood Intl. to O'Hare Intl., returning Mon, Dec 7, priced at $75 found 7 hours ago
Thu, Nov 12 - Sun, Nov 15
FLL
Fort Lauderdale - Hollywood Intl.
RFD
Greater Rockford
$76 Roundtrip, found 10 hours ago
$76
Roundtrip
found 10 hours ago
Select Allegiant Air flight, departing Thu, Nov 12 from Fort Lauderdale - Hollywood Intl. to Greater Rockford, returning Sun, Nov 15, priced at $76 found 10 hours ago
Fri, Dec 11 - Mon, Dec 14
FLL
Fort Lauderdale - Hollywood Intl.
SBN
South Bend Intl.
$88 Roundtrip, found 12 hours ago
$88
Roundtrip
found 12 hours ago
Select Allegiant Air flight, departing Fri, Dec 11 from Fort Lauderdale - Hollywood Intl. to South Bend Intl., returning Mon, Dec 14, priced at $88 found 12 hours ago
Fri, Jan 29 - Mon, Feb 1
AZA
Phoenix - Mesa Gateway
RFD
Greater Rockford
$98 Roundtrip, found 3 days ago
$98
Roundtrip
found 3 days ago
Select Allegiant Air flight, departing Fri, Jan 29 from Phoenix - Mesa Gateway to Greater Rockford, returning Mon, Feb 1, priced at $98 found 3 days ago
Thu, Dec 3 - Mon, Dec 7
FLL
Fort Lauderdale - Hollywood Intl.
MDW
Midway Intl.
$103 Roundtrip, found 6 days ago
$103
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Dec 3 from Fort Lauderdale - Hollywood Intl. to Midway Intl., returning Mon, Dec 7, priced at $103 found 6 days ago
Thu, Jan 28 - Fri, Feb 5
SFB
Orlando Sanford Intl.
RFD
Greater Rockford
$112 Roundtrip, found 1 day ago
$112
Roundtrip
found 1 day ago
Select Allegiant Air flight, departing Thu, Jan 28 from Orlando Sanford Intl. to Greater Rockford, returning Fri, Feb 5, priced at $112 found 1 day ago
Thu, Jan 21 - Mon, Jan 25
SFB
Orlando Sanford Intl.
SBN
South Bend Intl.
$112 Roundtrip, found 15 hours ago
$112
Roundtrip
found 15 hours ago
Select Allegiant Air flight, departing Thu, Jan 21 from Orlando Sanford Intl. to South Bend Intl., returning Mon, Jan 25, priced at $112 found 15 hours ago

Knox Flight Information

Traveling To
Knox
Destination Airport IATA Code
RFD
Number of Airlines Serving
Airlines
Frontier Airlines, Allegiant Air, Southwest Airlines, JetBlue Airways
Flight Price
$48
Earliest Departing Flight
Latest Departing Flight

Book Your Flight & Hotel Together & Save

Knox economy flight packages

Price found within the past 48 hours. Click for updated prices.
Hotel Riu Plaza Chicago
4.0-star property

Hotel Riu Plaza Chicago

Dec 3 - Dec 5

2 night stay

Atlanta (ATL) to Chicago (ORD)

Frontier Airlines • Roundtrip • Coach
Price was $503, price is now $292 per person
$292
per person
found 1 day ago
Sheraton Grand Chicago Riverwalk
4.0-star property

Sheraton Grand Chicago Riverwalk

Dec 20 - Dec 23

3 night stay

Atlanta (ATL) to Chicago (ORD)

Frontier Airlines • Roundtrip • Coach
Price was $1,440, price is now $428 per person
$428
per person
found 1 day ago
Level Chicago – Old Town
4.0-star property

Level Chicago – Old Town

Dec 5 - Dec 8

3 night stay

Atlanta (ATL) to Chicago (ORD)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $648, price is now $377 per person
$377
per person
found 1 day ago
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Knox first class flight packages

Price found within the past 48 hours. Click for updated prices.
The Talbott, Autograph Collection
4.5-star property

The Talbott, Autograph Collection

9.4/10 Exceptional! (185 reviews)

Dec 24 - Dec 27

3 night stay

Atlanta (ATL) to Chicago (ORD)

Delta • Roundtrip • FirstClass
Price was $970, price is now $853 per person
$853
per person
found 1 day ago
Staff was great and the room was clean!

Reviewed on Oct 29, 2026

Hotel Riu Plaza Chicago
4.0-star property

Hotel Riu Plaza Chicago

9.4/10 Exceptional! (5,555 reviews)

Dec 24 - Dec 27

3 night stay

Atlanta (ATL) to Chicago (ORD)

Delta • Roundtrip • FirstClass
Price was $1,268, price is now $983 per person
$983
per person
found 1 day ago
Great staff they accommodating us.

Reviewed on Oct 30, 2026

Sable at Navy Pier Chicago, Curio Collection by Hilton
4.0-star property

Sable at Navy Pier Chicago, Curio Collection by Hilton

9.4/10 Exceptional! (2,739 reviews)

Dec 24 - Dec 27

3 night stay

Atlanta (ATL) to Chicago (ORD)

Delta • Roundtrip • FirstClass
Price was $1,070, price is now $945 per person
$945
per person
found 1 day ago

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Knox

Finding cheap flights to Knox is easy when you have Orbitz at your fingertips. Not only does Orbitz offer great deals on Knox flights, but we also include some special extras to make booking a breeze. Just check out our:

Mobile Site and Apps

With Orbitz’s mobile site, m.orbitz.com, you can book your flights to Knox through your smartphone or tablet’s Web browser. Plus, our free downloadable apps for Android and iPhone mean it’s just a simple click to access your flight updates and alerts. You can even book exclusive mobile-only deals on hotels to go with your flights to Knox—even on the same day.

Pick and Choose or Book Full Vacation Packages

Don’t just be satisfied with great deals on Knox flights—go for the full package! With Orbitz, you can also find fantastic savings on the perfect hotel, car rental, cruise, and even activities, so you don’t waste your trip waiting in line but have the time to enjoy your trip. Pick and choose the add-ons you need, or book an entire vacation package for greater overall discounts.

Rewards That Are Miles Better

Booking directly with an airline earns you air miles or points, and you can get those same rewards with booking on Orbitz too. When you book qualifying flights to Knox with Orbitz, just add in your frequent flyer number during your online booking and your details will be sent to your program.

Great Deals Every Day

Add in our extra savings on packages, free nights, and other discounts, and you know you are in good hands.

Frequently asked questions

Which airlines fly to Knox?
Reserving a flight to Knox is easy — simply pick from 20 airlines that service South Bend Intl. Airport (SBN). When you've arranged your itinerary and packed your luggage, these top domestic carriers will happily welcome you on board:

  • United Airlines - 87 flights to Knox per month
  • American Airlines - 67 flights to Knox per month
  • Delta - 57 flights to Knox per month

How much is a flight to Knox?
Plenty of incredible deals were up for the taking this week, with round-trip flights to Knox fluctuating between $48 and $112. But it was passengers arriving in from Fort Lauderdale (FLL) who snapped up the biggest bargains. One-way fares to Knox started at a low $19.
How to book the cheapest flight to Knox?
Landing cheap flights to Knox is as easy as booking your ticket with Orbitz. But if you'd like to make sure you're walking away with the best flight deals around, here are a few tips to keep your wallet happy:

  • Depending on your departure point, click on the 'Nearby airports' function (located under the departure and arrival options). Sometimes, alternative departure points offer more value for money.
  • Similarly, click on the 'Show flexible dates' option to view the prices for days around your selected departure. It's possible to score cheaper flight deals if your itinerary is flexible.
  • You can also select the 'Show options' function to filter results for your preferred airline, seating class, nonstop flights and refundable flights. Under 'Sort & Filter' to the left, you can even pick the time of day you'd prefer to fly.
  • Book your fare as soon as you know your travel dates. While you can get lucky on occasion, airfares rarely fall in price as your departure date gets closer.
  • Consider combining your flights, hotels and car rentals into an Orbitz package deal to save cash.
  • Whenever possible, avoid flying in high seasons. Airfares significantly increase during school breaks, summer and around other vacation times like Easter and Thanksgiving.

What is the best time to book a flight to Knox?
Book in January, February or August for competitively priced tickets to Knox. Once you've located a bargain, snap it up — cheap flights will appear and vanish in the click of a mouse.
What day of the week is the cheapest to book a flight to Knox?
In general, Tuesdays, Wednesdays and Saturdays are the cheapest days to book a flight to Knox. If you want unbeatable airfares, search across those days and you just might pick up a great flight deal.
What is the cheapest day of the week to fly to Knox?
According to Orbitz data from 2020, Monday is generally the best day of the week for cheap flights to Knox. Tuesday also offers wallet-friendly fares, while Saturday has the highest ticket prices. Although leaving at the weekend may be easier to organize, you'll have more cash in your pocket to play with if you take off earlier in the week.
What is the cheapest month to fly to Knox?
We won't keep you guessing — based on Orbitz data, August is generally the most inexpensive month to fly. Perfect for those who need a weekend getaway or simply escape from it all before the weather changes. The costliest time to fly is the height of summer, with airfares peaking in June.
Which airlines allow free cancellation?
Orbitz makes it a cinch to find carriers that offer flexibility. Simply select "Filter by flexible change policies" when searching for your flights and bada bing, bada boom! You'll see options that include free cancellation, no change fees and of course, the very best price.
What do I need for the flight to Knox?
Flying can be a joy with a bit of pre-planning! Make your journey a hassle-free one with the following handy hints:

  • Before you step on to the plane, you'll need to present a valid form of government ID, such as your passport. You'll also need your boarding pass. If you're traveling with children, check with your airline about which documents they may need.
  • To keep you busy on the short hop to Knox, download your favorite songs or restock the audiobook library on your smartphone. Food can also be a welcome distraction while in the air, so take some snacks.
  • No matter the weather outside (or how long the flight), plane cabins can get a bit chilly. Bring a sweater on board to stop the goose bumps.

How do I get cheap first-class/business deals to Knox?
Smart travelers have a way of finding business or first-class flights to Knox without the steep price tag. Be like them with these helpful hints:

  • Be flexible. By being open to various travel dates, you'll have a better chance of spotting a sale on your airfares.
  • Many budget carriers these days offer excellent business or premium-class seating without the hefty fees.
  • Bid for an upgrade in online auctions or upgrade your ticket with your frequent flyer points.

More to Explore

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.