Frontier Airlines

IATA: F9 · Independent Carrier

Frontier Flights

Search and compare cheap Frontier Airlines tickets across 115+ destinations worldwide. Find the best F9 fares for your journey — only on FareOptic.

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About Frontier Airlines

Frontier Airlines (IATA: F9) is one of America's leading ultra-low-cost carriers, known for offering base fares among the lowest in the US domestic market. Founded in 1994 and headquartered in Denver, Colorado, Frontier operates 130+ Airbus A320 and A321 aircraft to 115+ destinations across the United States, Mexico, and the Caribbean. Each Frontier aircraft features a unique animal tail logo, celebrating wildlife and environmental awareness.

Frontier's business model focuses on ultra-low base fares with optional add-ons for bags, seat selection, and flexibility. The WORKS bundle packages the most common extras at a discounted price. FareOptic compares Frontier fares against other US carriers so you can calculate the true cost of travel including any add-ons.

Find and compare cheap flights

Everything you need to find and book your next cheap flight — all in one place.

Price Match Promise

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24/7 Customer Support

Speak to our travel experts anytime, anywhere.

ClubMiles Rewards

Stack points & airline miles to save.

Easy Cancellations

Convenient options online and 24/7 global concierge.

Popular Frontier Airlines Routes

Most searched Frontier domestic flights

Phoenix Sky Harbor Intl

ATL

Hartsfield-Jackson Atlanta Intl

Dallas/Fort Worth Intl

Minneapolis-St. Paul Intl

Frontier Airlines Hub Airports

Frontier operates through 4 major hubs, offering connections across its 115+-destination global network.

DEN

Denver International

Primary hub & HQ

ATL

Atlanta Hartsfield-Jackson

Focus city

ORD

Chicago O'Hare

Focus city

MIA

Miami International

Focus city

Frontier Airlines Cabin Classes

Find the right Frontier cabin for your journey and budget — from affordable Economy to premium Business.

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Standard

✓Lowest possible base fare
✓Personal item (18"×14"×8") only included
✓Seat selection optional (fee)
✓FRONTIER Miles earned
✓No changes after check-in opens

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UpFront Plus

✓Front section of aircraft
✓Standard carry-on included
✓Reserved middle seat blocked
✓Early boarding access
✓More legroom than Standard rows

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Stretch

✓Extended legroom (exit/bulkhead rows)
✓Standard carry-on included
✓Priority boarding access
✓More recline than standard seats
✓Best economy seat on the aircraft

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WORKS Bundle

✓Carry-on + checked bag included
✓Seat selection included
✓Priority boarding included
✓Change or cancel for free
✓Refundable flight credit if cancelled

FRONTIER Miles Program

FRONTIER Miles is Frontier's loyalty program where miles are earned on every Frontier flight based on miles flown. Elite status (Elite 20K, Elite 50K, Elite 100K) unlocks complimentary carry-on bags, seat selection, and priority boarding.

Earn Miles on Every Flight

Earn FRONTIER Miles based on the miles flown on every Frontier flight. Elite members earn bonus miles.

Elite Status Benefits

Elite 20K, 50K, and 100K tiers progressively unlock free carry-on bags, priority boarding, and seat selection.

The WORKS Bundle Value

Redeem miles or book The WORKS bundle to get carry-on, checked bag, seat selection, and free changes in one package.

Partner Earning

Earn FRONTIER Miles on hotel stays, car rentals, and purchases through Frontier's partner network.

Frontier Airlines Baggage Policy

Fees and allowances vary by route and fare type. Always verify at time of booking.

Bag / Policy	Standard	UpFront Plus	Stretch	WORKS Bundle
Personal item	Free	Free	Free	Free
Carry-on bag	Fee	Included	Included	Included
1st checked bag	Fee	Fee	Fee	Included
2nd checked bag	Fee	Fee	Fee	Fee
Weight limit	40 lb	40 lb	40 lb	40 lb

Frontier charges for carry-on bags and checked bags on most fare types. Adding bags online before departure is significantly cheaper than at the airport. The WORKS bundle includes carry-on, checked bag, seat selection, and free changes.

Check-In Options & Boarding

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Online Check-In

Opens 24 hours before departure at flyfrontier.com or the Frontier app. Online check-in saves time and ensures the lowest bag fee rates.

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Mobile App Check-In

Download the Frontier app on iOS or Android to check in, access your mobile boarding pass, and receive real-time gate and delay notifications.

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Airport Check-In

Self-service kiosks and staffed counters are available at all Frontier airports. Domestic gates typically close 15 minutes and international gates 30–45 minutes before departure.

Cancellation & Change Policy

24-Hour Risk-Free Cancellation

All Fares

All Frontier Airlines tickets can be cancelled within 24 hours of purchase for a full refund, regardless of fare type — provided the flight departs at least 2 days away.

Change Policy

Fare Dependent

Standard Frontier fares cannot be changed after 24 hours. The WORKS bundle allows free changes and cancellations with travel credit. All fares are cancellable within 24 hours of booking.

Non-Refundable Ticket Credit

Non-Refundable

If you cancel a non-refundable Frontier ticket after the 24-hour window, you typically receive a future travel credit valid for 12 months from the original issue date.

Refundable Fares

Flex Fares

Fully refundable fare types are available at a premium and provide maximum flexibility — suitable for travelers with uncertain plans.

In-Flight Experience on Frontier Airlines

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Wi-Fi Available

Frontier offers Wi-Fi for purchase on select aircraft. Stay connected at an affordable rate on longer domestic flights.

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Slimline Seats

Frontier uses lightweight slimline seats which are thinner but create more cabin space. Stretch seats in exit rows offer the best legroom onboard.

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Snacks & Beverages

Frontier sells snacks and beverages onboard. No complimentary offerings beyond water — keep travel costs low by bringing your own snacks.

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Unique Animal Tails

Every Frontier aircraft sports a unique wildlife tail livery — celebrating American wildlife and the airline's commitment to environmental sustainability.

Tips to Book Cheap Frontier Airlines Flights

1.Book Frontier's base fare only when travelling with a personal item that fits under the seat — add-ons can double the fare.
2.Add bags online when booking or before the departure window closes — airport bag fees are significantly higher.
3.The WORKS bundle (carry-on + checked bag + seat + changes) is often best value when you need 2+ add-ons.
4.Frontier fares are cheapest 2–4 weeks ahead on most domestic routes — especially for last-minute leisure travel.
5.Flying mid-week (Tuesday–Thursday) from Denver (DEN) consistently yields the lowest Frontier fares.
6.Frontier's FRONTIER Miles program is worth joining free — Elite status unlocks complimentary carry-on bags.
7.Compare Frontier's all-in price (base fare + bags + seat) against Southwest's fare including free bags on FareOptic.
8.Frontier's app often shows exclusive mobile-only fares and bundle deals not available on the website.

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Frequently Asked Questions

Everything you need to know about booking Frontier Airlines flights on FareOptic

Is Frontier Airlines really cheap when you add bags?

Frontier's base fares are among the lowest in the US, but the total cost including a carry-on bag ($35–$65) and checked bag ($45–$79) can match or exceed other carriers. Use FareOptic to compare Frontier's all-in price (fare + bags + seat) against Southwest (which includes 2 free bags) to determine true value for your trip.

What is included in the Frontier WORKS bundle?

The WORKS bundle includes one carry-on bag, one checked bag, seat selection, and the ability to change or cancel your flight for free (receiving a travel credit). The WORKS bundle is generally best value when you need at least two of these add-ons — calculate the standalone cost of each before deciding.

What is Frontier's baggage policy?

Frontier charges separately for carry-on bags and checked bags on most fare types. Only a personal item (18"×14"×8", must fit under the seat) is included free. Adding bags online is the cheapest option — airport check-in bag fees are highest. The WORKS bundle includes both carry-on and checked bag at a discounted combined price.

Does Frontier fly international routes?

Frontier primarily serves US domestic routes. Limited international service includes select destinations in Mexico and the Caribbean (Cancún, San José, Puerto Rico, Jamaica). Frontier does not operate transatlantic or transpacific routes. For international travel, compare fares from other carriers on FareOptic.

What is Frontier's cancellation policy?

Standard Frontier fares cannot be changed or cancelled after 24 hours of booking. The WORKS bundle includes free changes and cancellations (travel credit issued). All fares can be cancelled within 24 hours of booking for a full refund. Adding the WORKS bundle is the only way to retain full flexibility on Frontier flights.