$104 Cheap Frontier Airlines flights Chicago (ORD) to San Diego (SAN)

View $104 flight on Sat, Aug 16, 2025Opens in a new window

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$104 Cheap Frontier Airlines flights Chicago (ORD) to San Diego (SAN)

Prices were available within the past 7 days and start at $104 for one-way flights and $179 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Jul 1 - Mon, Jul 7
ORD
Chicago
SAN
San Diego
$179 Roundtrip, found 1 hour ago
$179
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Jul 1 from Chicago to San Diego, returning Mon, Jul 7, priced at $179 found 1 hour ago
Frontier Airlines
Wed, Aug 13 - Sat, Aug 16
ORD
Chicago
SAN
San Diego
$189 Roundtrip, just found
$189
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Aug 13 from Chicago to San Diego, returning Sat, Aug 16, priced at $189 just found
Flights from Chicago (ORD) to San Diego (SAN)
Origin airport
O'Hare Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, Sun Country Airlines, United
Popular airline
Alaska Airlines
Distance
1720 mi
Average flight time
2 hours 19 mins

Frequently asked questions

How much is a Frontier Airlines flight from O'Hare Intl. Airport (ORD) to San Diego Intl. Airport (SAN)?
Use the "Price (lowest to highest)" filter on Expedia to find cheap Frontier Airlines round-trip flights from $179 from ORD to SAN. Affordable one-way options from $104 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from ORD to SAN with Frontier Airlines?
Search for one-way or return flights to San Diego in January or November. You could find cheaper fares with Frontier Airlines during these off-season months.
What is the cheapest time to book flights from O'Hare Intl. Airport (ORD) to San Diego Intl. Airport (SAN) with Frontier Airlines?
Search for cheap Frontier Airlines flights from O'Hare Intl. Airport (ORD) to San Diego Intl. Airport (SAN) one to three months prior to your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Frontier Airlines fly nonstop from O'Hare Intl. Airport (ORD) to San Diego Intl. Airport (SAN)?
To find out if there's a direct trip from ORD to SAN with Frontier Airlines or another carrier, check the "Nonstop" filter when looking for tickets.
What is the earliest Frontier Airlines flight from ORD to SAN?
Filter your results by "Early Morning" and "Morning" to browse the earliest departures from ORD to SAN. Leaving early means you're 20% less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Frontier Airlines fly into in San Diego?
Catch a Frontier Airlines flight from O'Hare Intl. Airport (ORD) to San Diego, and you'll most likely touch down at San Diego Intl. Airport (SAN). This is the airline's main hub here.
Why fly with Frontier Airlines from ORD to SAN?
A rewarding loyalty program and the chance to rack up points through Frontier Miles are the start of the reasons to leave from ORD to SAN with Frontier Airlines. Plus, by joining Expedia's free One Key™ program, you can earn OneKeyCash™* on top of Frontier Airlines's loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Frontier Airlines flight from O'Hare Intl. Airport (ORD) to San Diego Intl. Airport (SAN)?
Depending on the ticket type you purchased, a fee is typically charged if you cancel or reschedule your booking more than 24 hours after it's been confirmed. To find flexible plane tickets, select our "Changes included" or "No cancel fee" filter when you search for flights. For additional information on canceling or changing your reservation, head to "Trips," select your flight and click on "Manage Booking."

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