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SUN COUNTRY AIRLINES ANNOUNCES 18 NEW NONSTOP ROUTES Sun Country offering even more options for vacationers eager to resume traveling with service at 9 new airports

MINNEAPOLIS. April 27, 2021 – Sun Country Airlines (NASDAQ: SNCY) today announced the addition of 18 new nonstop routes, adding nine airports to its growing network. The expansion includes six nonstop routes from Minneapolis-St. Paul International Airport (MSP), two nonstop routes from Duluth International Airport (DLH), two nonstop routes from Green Bay Austin Straubel International Airport (GRB), one nonstop route from Dane County Regional Airport (MSN), five nonstop routes from Milwaukee Mitchell International Airport (MKE) and two routes from Rochester International Airport (RST).

The airline welcomes Duluth International Airport (DLH), Owen Roberts International Airport (GCM) in Grand Cayman, Green Bay Austin Straubel International Airport (GRB), Milwaukee Mitchell International Airport (MKE), Phoenix-Mesa Gateway Airport (AZA), Punta Gorda Airport (PGD), Rochester International Airport (RST), St. Pete-Clearwater International Airport (PIE) and Providenciales International Airport (PLS) in Turks and Caicos to its growing network.

Of the 18 newly announced routes, ten will offer the only nonstop service to travelers. From Minneapolis- St. Paul International Airport, Sun Country will offer the only nonstop flights to Phoenix-Mesa Gateway Airport (AZA), Punta Gorda Airport (PGD), St. Pete-Clearwater International Airport (PIE) and Providenciales International Airport (PLS).

From Milwaukee Mitchell International Airport (MKE), Sun Country will offer the only scheduled nonstop service to Cancun International Airport (CUN). From Duluth International Airport (DLH), Green Bay Austin Straubel International Airport (GRB) and Rochester International Airport (RST), the airline will offer the only nonstop flights to both Southwest Florida International Airport (RSW) and Phoenix Sky Harbor International Airport (PHX).

“With more and more people excited to resume traveling, we’re thrilled to be able to offer them the opportunity to visit these incredible vacation destinations this winter,” said Sun Country Airlines Chief Revenue Officer Grant Whitney. “We’re really proud to bring our brand of convenient, affordable travel to more cities in the Upper Midwest, so folks can enjoy the vacations they’ve been dreaming about.”

Sun Country will now offer service to five different airports on Florida’s Gulf Coast, providing visitors to the area with the flexibility to choose the destination airport that best suits their needs. With today’s expansion, Sun Country Airlines will operate a total of 93 routes across 69 airports in the United States, Mexico, Central America and Caribbean.

“It is great to see Sun Country Airlines continuing to grow at MSP International Airport, taking people to the places they want to go,” said Metropolitan Airports Commission CEO Brian Ryks. “Sun Country is the first airline to offer scheduled service from MSP to four of these five destinations. All five new routes will offer fantastic getaway experiences when the weather turns cold again next winter.”

Sun Country’s customer experience includes free in-flight entertainment, a new mobile-friendly website with more self-service tools, and new interiors on each aircraft. Sun Country provides safe, reliable, hassle-free flights at affordable prices with warm and friendly service. The airline’s mission is to connect guests to their favorite people and places, to create lifelong memories and transformative experiences.

Sun Country Rewards members who book one of the new routes before 11:59 p.m. CT on Monday, May 3, 2021 will earn two points per dollar on their bookings. These routes are on sale now at suncountry.com.

The full list of new seasonal/year-round routes includes:

From Minneapolis-St. Paul International Airport (MSP)

• Phoenix-Mesa Gateway Airport (AZA) o Service begins November 24, 2021 o Operates four days weekly on Monday, Thursday, Friday, Sunday o One-way fares as low as $79* • Bozeman Yellowstone International Airport (BZN) o Service begins December 16, 2021 (extended from previous schedule) o Operates twice weekly on Thursdays and Sundays o One-way fares as low as $89* • St. Pete-Clearwater International Airport (PIE) o Service begins November 25, 2021 o Operates four days weekly on Monday, Thursday, Friday, Sunday o One-way fares as low as $79* • Punta Gorda Airport (PGD) o Service begins December 10, 2021 o Operates twice weekly on Mondays and Fridays o One-way fares as low as $89* • Owen Roberts International Airport (GCM) o Service begins December 18, 2021 o Operates once weekly on Saturdays o One-way fares as low as $159* • Providenciales International Airport (PLS) o Service begins December 18, 2021 o Operates once weekly on Saturdays o One-way fares as low as $159*

From Duluth International Airport (DLH)

• Southwest Florida International Airport (RSW) o Service begins December 17, 2021 o Operates twice weekly on Mondays and Fridays o One-way fares as low as $79* • Phoenix Sky Harbor International Airport (PHX) o Service begins December 17, 2021 o Operates twice weekly on Mondays and Fridays o One-way fares as low as $79*

From Green Bay Austin Straubel International Airport (GRB)

• Southwest Florida International Airport (RSW) o Service begins December 16, 2021 o Operates twice weekly on Thursdays and Sundays o One-way fares as low as $79* • Phoenix Sky Harbor International Airport (PHX) o Service begins December 17, 2021 o Operates twice weekly on Mondays and Fridays o One-way fares as low as $79*

From Dane County Regional Airport (MSN)

• Phoenix Sky Harbor International Airport (PHX) o Service begins December 16, 2021 o Operates twice weekly on Thursdays and Sundays o One-way fares as low as $79*

From Milwaukee Mitchell International Airport (MKE)

• Minneapolis-St. Paul International Airport (MSP) o Service begins August 26, 2021 o Operates twice weekly on Thursdays and Sundays o One-way fares as low as $39* • Cancun International Airport (CUN) o Service begins December 18, 2021 o Operates once weekly on Saturdays o One-way fares as low as $179* • McCarran International Airport (LAS) o Service begins August 26, 2021 o Operates twice weekly on Thursdays and Sundays o One-way fares as low as $89* • Southwest Florida International Airport (RSW) o Service begins December 15, 2021 o Operates twice weekly on Wednesdays and Saturdays o One-way fares as low as $89* • Phoenix Sky Harbor International Airport (PHX) o Service begins December 16, 2021 o Operates twice weekly on Thursdays and Sundays o One-way fares as low as $79*

From Rochester International Airport (RST)

• Southwest Florida International Airport (RSW) o Service begins February 3, 2022 o Operates twice weekly on Thursdays and Sundays o One-way fares as low as $79* • Phoenix Sky Harbor International Airport (PHX) o Service begins February 4, 2022 o Operates twice weekly on Mondays and Fridays o One-way fares as low as $69*

• Fares are valid for one-way travel and are inclusive of all government taxes and fees. • Must be purchased by 11:59 pm CT (Central Time) on May 4, 2021. • Additional baggage and other service fees may apply. • Seats are limited and fare may not be available on all flights or dates within the travel range. • Valid for new bookings only. • Fares, routes and schedules are subject to change without notice. • Restrictions apply.

2x point multiplier only valid on itineraries booked to/from Minneapolis-St. Paul International Airport (MSP), Phoenix-Mesa Gateway Airport (AZA), Bozeman Yellowstone International Airport (BZN), St. Pete-Clearwater (PIE), Punta Gorda Airport (PGD), Owen Roberts International Airport (GCM), Providenciales International Airport (PLS), Duluth International Airport (DLH), Southwest Florida International Airport (RSW), Phoenix Sky Harbor International Airport (PHX), General Mitchell International Airport (MKE), Cancun International Airport (CUN), McCarran International Airport (LAS), Rochester International Airport (RST), Green Bay Austin Straubel International Airport (GRB), and Dane County Regional Airport (MSN). Multiplier promotion valid through 11:59 pm CT (Central Time) on May 3, 2021. Sun Country Rewards number must be added to the Sun Country reservation to receive extra bonus points. Bonus points will be posted to members' accounts within 14 days of completing qualifying travel. Points are only reflected in total balance. 2x point multiplier only applies to the Sun Country Rewards base earn rate of 2pts per $1. When providing a Sun Country Rewards number, bonus points will be awarded for flights qualifying during the booking period and booked directly on suncountry.com. All reservations must be issued by Sun Country Airlines. All bonuses must be earned and used according to the terms and conditions of the Sun Country Rewards program. Additional rules and restrictions may apply. Sun Country Airlines is the final authority on interpretation of these rules.

About Sun Country

Sun Country Airlines is a new breed of hybrid low-cost air carrier that dynamically deploys shared resources across our synergistic scheduled service, charter and cargo businesses. Based in , we focus on serving leisure and visiting friends and relatives ("VFR") passengers and charter customers and providing cargo CMI services, with flights throughout the United States and to destinations in Mexico, Central America and the Caribbean.

For photos, b-roll and additional company information, visit www.suncountryview.com/multimedia.

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