Spirit Airlines slams 'anti-competitive' United-JetBlue pact, calls for a DOT review
Spirit Airlines is opposing United Airlines and JetBlue Airways' "Blue Sky" partnership, claiming the proposed pact is a "coordinated oligopoly masquerading as competition."
The Florida-based discounter wants the U.S. Department of Transportation to open a public docket and review the loyalty and joint ticket sales portions of the partnership, it said in a regulatory filing Tuesday. Spirit argued that what United and JetBlue propose would amount to the latter becoming a "de facto vassal of United."
"This anti-competitive tie-up involving a dominant legacy carrier will neutralize the competitive benefit of an existing low-fare competitor (JetBlue), will raise fares, and will tend to weaken other value airlines, such as Spirit and others, by siphoning off customers attracted by access to the United loyalty program," Spirit said.
Bargain hunting: When is the best time to book flights for the cheapest airfare?
United and JetBlue unveiled the unique Blue Sky partnership in May. A replacement for JetBlue's failed Northeast Alliance with American Airlines, the tie-up focuses almost entirely on loyalty by providing members of United's MileagePlus and JetBlue's TrueBlue programs reciprocal benefits on either airline. It also includes sales of both airlines' flights on either carrier's website, both United and JetBlue adopting some of the other's technology, and, in 2027, United's return to New York's John F. Kennedy International Airport (JFK) with slots provided by JetBlue.
"United's global reach perfectly complements JetBlue's East Coast leisure network, and significantly expands the options and benefits for TrueBlue members," Joanna Geraghty, the CEO of JetBlue, said when the deal was announced.
And she is right — the partnership will provide TrueBlue members with significantly more utility by opening United's entire global network, which is four times the size of JetBlue's by flight numbers.
United's MileagePlus program would also gain more relevancy in key markets, including Boston and Florida, where the airline is a small player.
That joint benefit would come at the expense of competitors like Spirit.
Analysis: Why I'm excited about United and JetBlue's new partnership, and where there's room to grow
The discounter had sought to merge with JetBlue only to see the deal blocked on antitrust grounds by a federal judge. That ruling was followed by a Chapter 11 bankruptcy filing by Spirit in November 2024, from which it emerged this March as a significantly smaller airline.
But, as Cranky Flier author Brett Snyder recently told Raymond James' Savanthi Syth, Frontier Airlines and Spirit act as primarily "spill carriers" — or those that pick up what traffic is left over from larger, legacy or midmarket airlines — due to their broad route map overlap and poor customer perception.
That leaves an airline like Spirit in an unenviable competitive position in the U.S. market, and one that could be further pressured by a United-JetBlue partnership.
Spirit is the sixth-largest airline by seats in New England and New York, with just a 2.7% share in June, schedule data from aviation analytics firm Cirium shows. United is the second largest, with a 17% share, and JetBlue is third, with a nearly 15% share.
The DOT will weigh Spirit's request for a public docket and review of the Blue Sky partnership.
Related reading:
- The best airline credit cards
- What exactly are airline miles, anyway?
- 6 real-life strategies you can use when your flight is canceled or delayed
- Maximize your airfare: The best credit cards for booking flights
- The best credit cards to reach elite status
- What are points and miles worth? TPG's monthly valuations
TPG featured card
at American Express's secure site
Terms & restrictions apply. See rates & fees.
| 3X | Earn 3X Miles on Delta purchases. |
| 1X | Earn 1X Miles on all other eligible purchases. |
Pros
- Delta SkyClub access when flying Delta
- Annual companion ticket for travel on Delta (upon renewal)
- Ability to earn MQDs through spending
- Various statement credits for eligible purchases
Cons
- Steep annual fee of $650
- Other Delta cobranded cards offer superior earning categories
- Earn 100,000 Bonus Miles after you spend $6,000 or more in purchases with your new Card within the first 6 months of Card Membership and an additional 25,000 bonus miles after you make an additional $3,000 in purchases on the Card within your first 6 months, starting from the date that your account is opened. Offer Ends 04/01/2026.
- Delta SkyMiles® Reserve American Express Card Members receive 15 Visits per Medallion® Year to the Delta Sky Club® when flying Delta and can unlock an unlimited number of Visits after spending $75,000 in purchases on your Card in a calendar year. Plus, you’ll receive four One-Time Guest Passes each Medallion Year so you can share the experience with family and friends when traveling Delta together.
- Enjoy complimentary access to The Centurion® Lounge in the U.S. and select international locations (as set forth on the Centurion Lounge Website), Sidecar by The Centurion® Lounge in the U.S. (see the Centurion Lounge Website for more information on Sidecar by The Centurion® Lounge availability), and Escape Lounges when flying on a Delta flight booked with the Delta SkyMiles® Reserve American Express Card. § To access Sidecar by The Centurion® Lounge, Card Members must arrive within 90 minutes of their departing flight (including layovers). To access The Centurion® Lounge, Card Members must arrive within 3 hours of their departing flight. Effective July 8, 2026, during a layover, Card Members must arrive within 5 hours of the connecting flight.
- Receive $2,500 Medallion® Qualification Dollars with MQD Headstart each Medallion Qualification Year and earn $1 MQD for each $10 in purchases on your Delta SkyMiles® Reserve American Express Card with MQD Boost to get closer to Status next Medallion Year.
- Enjoy a Companion Certificate on a Delta First, Delta Comfort, or Delta Main round-trip flight to select destinations each year after renewal of your Card. The Companion Certificate requires payment of government-imposed taxes and fees of between $22 and $250 (for itineraries with up to four flight segments). Baggage charges and other restrictions apply. Delta Basic experiences are not eligible for this benefit.
- $240 Resy Credit: When you use your Delta SkyMiles® Reserve American Express Card for eligible purchases with U.S. Resy restaurants, you can earn up to $20 each month in statement credits. Enrollment required.
- $120 Rideshare Credit: Earn up to $10 back in statement credits each month after you use your Delta SkyMiles® Reserve American Express Card to pay for U.S. rideshare purchases with select providers. Enrollment required.
- Delta SkyMiles® Reserve American Express Card Members get 15% off when using miles to book Award Travel on Delta flights through delta.com and the Fly Delta app. Discount not applicable to partner-operated flights or to taxes and fees.
- With your Delta SkyMiles® Reserve American Express Card, receive upgrade priority over others with the same Medallion tier, product and fare experience purchased, and Million Miler milestone when you fly with Delta.
- Earn 3X Miles on Delta purchases and earn 1X Miles on all other eligible purchases.
- No Foreign Transaction Fees. Enjoy international travel without additional fees on purchases made abroad.
- $650 Annual Fee.
- Apply with confidence. Know if you're approved for a Card with no impact to your credit score. If you're approved and you choose to accept this Card, your credit score may be impacted.
- Terms Apply.
- See Rates & Fees


