1-856-513-6369

Louisville to Ontario Flights — Fares from $422.00 | SDF–ONT

Compare the cheapest Louisville (SDF) to Ontario (ONT) fares found by our live flight search, then book online or over the phone with our travel experts.

📞 Call 1-856-513-6369
Adults
12+
1
Children
2–11
0
Infants
Under 2
0
Cabin
🏷️
Save up to 40% with unpublished phone fares
Consolidator deals on selected Louisville → Ontario flights that do not appear in online search results. The live fares below are bookable right now — or call to check for an unpublished fare on your dates.
📞 1-856-513-6369

One-way fares Louisville → Ontario

showing indicative fares · loading live prices…
Delta Air Lines
Delta Air Lines CHEAPEST
SDF → ONT · Economy
lowest fare seen on this route
$703.40
$422.04
Select
American Airlines
American Airlines
SDF → ONT · Economy
lowest fare seen on this route
$763.39
$458.03
Select
See all flights & times → Prices per adult, one way, incl. taxes & fees. Availability changes constantly.
📞 Call for phone-only fares ✈ See flights

Live fares we can book on SDF–ONT

Lowest fare found per airline on the SDF → ONT route, with our discounted phone-deal price.

AirlineCabin Found fareOur discounted fare Fare found on
Delta Air Lines Delta Air Lines Economy $703.40 $422.04 Oct 15, 2026 Book
American Airlines American Airlines Economy $763.39 $458.03 Oct 15, 2026 Book

Discounted fares are negotiated phone deals from our vendor network and may not appear in online search results — call 1-856-513-6369 to lock one in. Fares were found on the dates shown, are per person in USD, and change with availability.

Ontario
Ontario, United States

More routes we cover

Louisville to Charlotte Louisville to Honolulu, Oahu Louisville to Kahului Louisville to Lafayette Louisville to Las Vegas Louisville to Los Angeles Albuquerque to Ontario Atlanta to Ontario Augusta to Ontario Austin to Ontario Baltimore to Ontario Boise to Ontario All routes →

Why book with FlyLemo

💸 Transparent pricing
The fare you see is all-inclusive — taxes and fees shown before you pay, never after.
🤝 Real travel experts
Every booking is reviewed by our team, and phone-only vendor deals can beat any online price.
🎧 24/7 human support
Before, during and after your trip — changes, cancellations and special requests handled by people.
🔒 Secure checkout
Encrypted payment, verified confirmation emails, and your PNR delivered as soon as the airline issues it.

FlyLemo is an independent travel agency — call 1-856-513-6369 or use the search above to compare live fares on this route. See our terms, privacy policy, refund policy and service fees for full details, or contact us any time.

Page updated October 15, 2026 · fare data refreshed automatically from live flight searches.