Horizon Air Expands Mammoth Mountain Service With Flights from Northern California and Pacific Northwest

MAMMOTH LAKES, Calif. — After a successful first winter season, Horizon Air is expanding air
service to the Mammoth Mountain resort for the upcoming snow season. In addition to adding a second
daily nonstop from Los Angeles, Horizon will offer new daily nonstop service from San Jose and Reno
and direct (same-plane, one-stop) service from Seattle and Portland.

The Mammoth Mountain resort area is just 15 minutes from the Mammoth Lakes Yosemite airport.
During last year’s inaugural season of service, thousands of Southern Californians took advantage of
Horizon’s 70-minute flight from Los Angeles instead of enduring five hours or more of driving.

“Our Southern California customers have made no secret of how much they’ve appreciated having such
quick and easy access to this world-class recreation area,” said Dan Russo, Horizon’s vice president
of marketing and communications. “Now, with Horizon Air’s expanded service, winter sports
enthusiasts from Northern California and the Pacific Northwest will be able to enjoy the same
convenience.”

The new service from Northern California and the Pacific Northwest is expected to introduce thousands
of new visitors to Mammoth – many of whom would not have considered it for a winter vacation
otherwise. Similarly, travelers from the town of Mammoth will gain an easier way to travel, with nonstop
service to Los Angeles, Reno and San Jose, and direct (same-plane, one-stop) service to Seattle and
Portland.

“The new and expanded routes on Horizon for next season put Mammoth within easy reach of
thousands of skiers and snowboarders who love to play big in the mountains and have dreamed of
visiting Mammoth for years,” said Howard Pickett, CMO of Mammoth Mountain. “Our guests loved the
flights from Los Angeles last year and they asked us for even more flight options. With this expansion
into Northern California, Reno and the Pacific Northwest, we are doing our best to deliver on that
request.”

Horizon is offering special low fares for flights on select days between Mammoth and each city. Fares
start at $49 each way from Reno, $69 from San Jose or Los Angeles, $144 from Portland, and $149
from Seattle.

The Mammoth winter season flight schedule shown below will run from Dec. 17, 2009, through April 11,
2010, and is available for sale now at www.horizonair.com or by calling 800-547-9308 (TTY at 800-682-
2221).

Depart Los Angeles Arrive Mammoth
8:40 a.m. and 9:50 a.m. Daily
2:40 p.m. and 3:50 p.m. Daily

Depart Mammoth Arrive Los Angeles
12:50 p.m. and 1:59 p.m. Daily
5:50 p.m. and 6:59 p.m. Daily

Depart Seattle Arrive Mammoth
1:55 p.m. and 5:20 p.m.* Daily
Depart Mammoth Arrive Seattle
4:20 p.m. and 7:50 p.m.* Daily
* Stops in Reno

Depart Portland Arrive Mammoth
8:50 a.m. and 12:20 p.m.* Daily
Depart Mammoth Arrive Portland
10:20 a.m. and 1:50 p.m.* Daily
* Stops in San Jose

Depart Reno Arrive Mammoth
4:30 p.m. and 5:20 p.m. Daily
Depart Mammoth Arrive Reno
4:20 p.m. and 5:10 p.m. Daily

Depart San Jose Arrive Mammoth
11:25 a.m. and 12:20 p.m. Daily
Depart Mammoth Arrive San Jose
10:20 a.m. and 11:15 a.m. Daily

Well known for long seasons and plentiful snowfall, Mammoth Mountain is Southern California’s favorite
mountain resort and is consistently ranked among the top ski resorts in the country by SKI Magazine.
It currently hosts more than 1.1 million skiers per year, making it the third most visited mountain resort
in the country, and boasts one of the most recognized terrain parks in the world. Other winter activities
around Mammoth include cross-country skiing, ice skating, snowmobiling, dog sledding and dipping
into the hot springs. Mammoth Mountain Ski Area owns and operates a variety of resort businesses,
including recreation, hospitality, real estate development, food and beverage, and retail. More
information is available at MammothMountain.com.

Horizon will operate all flights to Mammoth with 76-seat Bombardier Q400s. This high-speed, twin-
engine turboprop is one of the most technologically advanced regional aircraft in the world. It’s as quiet
and comfortable as a jet – thanks to special technology that suppresses noise and vibration,
generously sized overhead storage bins, unobstructed under-seat space, and ample headroom (6 feet,
5 inches). The Q400 is also among the most environmentally friendly aircraft today, burning 30 percent
to 40 percent less fuel and producing an equally lower amount of emissions (and 10 decibels less
noise) than comparable jets.

Onboard, travelers will enjoy Horizon’s award-winning service, which includes – at no extra charge –
Starbucks coffee, soft drinks, snacks, and (for passengers 21 and older) Northwest wines and
microbrews. Members of the Horizon Air/Alaska Airlines Mileage Plan frequent flier program can earn
500 miles or actual mileage on Horizon flights to Mammoth. Mileage Plan miles are redeemable for
flights worldwide on Horizon Air, Alaska Airlines and their numerous Mileage Plan partner airlines.

Horizon serves 48 cities throughout Arizona, California, Oregon, Washington, Idaho, Montana, Nevada,
Baja California Sur (Mexico), and British Columbia and Alberta (Canada). Together, Horizon Air and
Alaska Airlines serve more than 90 cities and are subsidiaries of Alaska Air Group, Inc. (NYSE:ALK).

*FARE RULES: Valid for: Nonstop travel between Mammoth and Los Angeles, Reno or San Jose; or direct travel between Mammoth and Portland or Seattle. Day/Time: Valid
Tuesday, Wednesday, Saturday. Advance purchase: 7 days. Travel from: 12/17/09. Complete travel by: 4/11/10. Blackout dates: None. Not Included in the fare shown: U.S. Airport
Passenger Facility Charges of up to $9 (amount depends on itinerary), U.S. Federal Segment Tax of $3.60 per segment (take-off and landing), and U.S. Security Fee of $2.50 per
enplanement. Other important information: All taxes and fees shown are based on one-way travel and may be doubled if traveling roundtrip. Tickets are nonrefundable, but can be
changed for a $75 fee when changes are made online at horizonair.com ($100 when changes are made through our reservation call center or ticket counters and $125 when
originally booked through a travel agent and changes are made through our reservations call center or ticket counters) and any applicable changes in fare. A ticket purchased at a
Horizon Air airport location or through our reservations call center will cost $15 more per person than the advertised fare. Seats are limited and may not be available on all flights or
all days. All fares, taxes, and fees are subject to change without notice and other restrictions apply. A $15 charge will apply to the first checked bag. A second bag may be checked
for $25. A fee of $100 will be assessed for each additional checked bag. Additional fees apply to overweight or oversized checked baggage. Complete fare rules available at horizonair.com.