$85 Cheap Frontier Airlines flights Milwaukee (MKE) to San Diego (SAN)

View $85 flight on Fri, Sep 19, 2025Opens in a new window

$85 Cheap Frontier Airlines flights Milwaukee (MKE) to San Diego (SAN)

Prices were available within the past 7 days and start at $85 for one-way flights and $169 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Sep 19 - Sun, Sep 21
MKE
Milwaukee
SAN
San Diego
$169 Roundtrip, just found
$169
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Sep 19 from Milwaukee to San Diego, returning Sun, Sep 21, priced at $169 just found
Frontier Airlines
Fri, Sep 19 - Mon, Sep 22
MKE
Milwaukee
SAN
San Diego
$195 Roundtrip, found 4 hours ago
$195
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Fri, Sep 19 from Milwaukee to San Diego, returning Mon, Sep 22, priced at $195 found 4 hours ago
Frontier Airlines
Fri, Nov 14 - Mon, Nov 17
MKE
Milwaukee
SAN
San Diego
$196 Roundtrip, found 1 day ago
$196
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Nov 14 from Milwaukee to San Diego, returning Mon, Nov 17, priced at $196 found 1 day ago
Frontier Airlines
Fri, Oct 24 - Fri, Oct 31
MKE
Milwaukee
SAN
San Diego
$200 Roundtrip, found 1 day ago
$200
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 24 from Milwaukee to San Diego, returning Fri, Oct 31, priced at $200 found 1 day ago
Frontier Airlines
Fri, Sep 26 - Sun, Sep 28
MKE
Milwaukee
SAN
San Diego
$203 Roundtrip, found 1 hour ago
$203
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Sep 26 from Milwaukee to San Diego, returning Sun, Sep 28, priced at $203 found 1 hour ago
Frontier Airlines
Mon, Nov 3 - Sun, Nov 9
MKE
Milwaukee
SAN
San Diego
$207 Roundtrip, found 1 day ago
$207
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Nov 3 from Milwaukee to San Diego, returning Sun, Nov 9, priced at $207 found 1 day ago
Flights from Milwaukee (MKE) to San Diego (SAN)
Origin airport
General Mitchell Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Popular airline
Alaska Airlines
Distance
1735 mi

Frequently asked questions

How much is a Frontier Airlines flight from General Mitchell Intl. Airport (MKE) to San Diego Intl. Airport (SAN)?
You can discover affordable return Frontier Airlines flights from $169 from MKE to SAN by organizing your results from "Price (lowest to highest)" on Expedia. Or look for options from $85 for a one-way trip.**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 MKE to SAN with Frontier Airlines?
Browse for round-trip or one-way flights to San Diego in January or November. You could find lower fares with Frontier Airlines during these off-season months.
What is the cheapest time to book flights from General Mitchell Intl. Airport (MKE) to San Diego Intl. Airport (SAN) with Frontier Airlines?
Search for affordable Frontier Airlines flights from General Mitchell Intl. Airport (MKE) to San Diego Intl. Airport (SAN) one to three months ahead of your departure date. 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. Regardless of fare type and journey, the best day of the week to book a domestic flight is usually 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 General Mitchell Intl. Airport (MKE) to San Diego Intl. Airport (SAN)?
Use the "Nonstop" filter when looking for direct Frontier Airlines flights from MKE to SAN. It's also an easy way to compare other carriers offering the same direct route.
What is the earliest Frontier Airlines flight from MKE to SAN?
Filter your results by "Morning" and "Early Morning" to find the earliest departures from MKE to SAN. Setting off early means flight cancellations are less likely.**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?
Board a Frontier Airlines flight from General Mitchell Intl. Airport (MKE) to San Diego, and you'll probably arrive at San Diego Intl. Airport (SAN). This is the airline's main hub in this city.
Why fly with Frontier Airlines from MKE to SAN?
A rewarding loyalty program and the ability to rack up points through Frontier Miles are the start of the reasons to jet off from MKE to SAN with Frontier Airlines. Plus, when you sign up to Expedia's free One Key™ program, you can receive OneKeyCash™* in addition to any airline loyalty program earnings. It's yours to spend on your next adventure.*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 General Mitchell Intl. Airport (MKE) to San Diego Intl. Airport (SAN)?
It's usually possible to cancel or modify your flight, although there may be additional charges if your booking was made over 24 hours ago. Want to keep your options open? Apply the "No cancel fee" or "Changes included" filter to find flights that won't penalize you if you have to alter your plans. To make modifications, head to "Trips," select your flight and click on "Manage Booking" for further information.

Explore a world of travel with Expedia

*Available to One Key members.