$125 Cheap United flights Kansas City (MCI) to San Diego (SAN)

View $125 flight on Fri, Oct 31, 2025Opens in a new window

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$125 Cheap United flights Kansas City (MCI) to San Diego (SAN)

Prices were available within the past 7 days and start at $125 for one-way flights and $208 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Aug 16 - Fri, Aug 22
MCI
Kansas City
SAN
San Diego
$208 Roundtrip, just found
$208
Roundtrip
just found
Select United flight, departing Sat, Aug 16 from Kansas City to San Diego, returning Fri, Aug 22, priced at $208 just found
United
Wed, Sep 24 - Tue, Sep 30
MCI
Kansas City
SAN
San Diego
$244 Roundtrip, just found
$244
Roundtrip
just found
Select United flight, departing Wed, Sep 24 from Kansas City to San Diego, returning Tue, Sep 30, priced at $244 just found
Flights from Kansas City (MCI) to San Diego (SAN)
Origin airport
Kansas City Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, Spirit Airlines, United
Popular airline
Alaska Airlines
Distance
1331 mi
Average flight time
2 hours 15 mins

Frequently asked questions

How much is a United Airlines flight from Kansas City Intl. Airport (MCI) to San Diego Intl. Airport (SAN)?
Finding cheap one-way United Airlines flights from MCI to SAN from $125 on Expedia couldn't be simpler — just filter by "Price (lowest to highest)." Or check out our affordable return fares from $208 for your next exciting getaway.**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 MCI to SAN with United Airlines?
Browse for one-way or round-trip flights to San Diego in January or November. You could find lower fares with United Airlines during these quieter months.
What is the cheapest time to book flights from Kansas City Intl. Airport (MCI) to San Diego Intl. Airport (SAN) with United Airlines?
To find cheap United Airlines fares from Kansas City Intl. Airport (MCI) to San Diego Intl. Airport (SAN), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the overall cost. Sunday is usually the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**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 United Airlines fly nonstop from Kansas City Intl. Airport (MCI) to San Diego Intl. Airport (SAN)?
To see if there's a direct trip from MCI to SAN with United Airlines or another airline, select the "Nonstop" filter when searching for tickets.
What is the earliest United Airlines flight from MCI to SAN?
Browse United Airlines's earliest flights from MCI to SAN by selecting the "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being canceled.**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 United Airlines fly into in San Diego?
Jump on a United Airlines flight from Kansas City Intl. Airport (MCI) to San Diego, and you'll probably touch down at San Diego Intl. Airport (SAN). This is the airline's main hub here.
Why fly with United Airlines from MCI to SAN?
With a rewarding loyalty program, United Airlines is a popular choice for many travelers journeying from MCI to SAN. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*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 United Airlines flight from Kansas City Intl. Airport (MCI) to San Diego Intl. Airport (SAN)?
Changes are usually free within 24 hours of making your booking, but your airline may add a charge after that time. For further details about altering your flights, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to adjust your plans without being charged, apply the "Changes included" and "No cancel fee" filters when organizing your next trip.

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*Available to One Key members.