Delta and United Airlines are two of the largest and most popular carriers in the US. As a traveler, you may wonder what sets them apart from each other and which one you should book. In this blog, we compare Delta and United Airlines across key categories, including route networks, reliability, loyalty programs, fees, and basic economy value.
Choosing a Carrier: Delta vs United Airlines
Which airline should you give your business to? Delta and United Airlines are relatively evenly matched in terms of affordability and overall flight experience.
1. Comparing Domestic and International Flight Networks
Both Delta and United offer extensive connectivity, but United comes out on top because of its better domestic routes and broad international partner network.
Delta
Delta is part of the SkyTeam global airline alliance which includes 18 partner airlines, including Air France, Korean Air, Aeromexico, and KLM. Through its own operations and airline partnerships, Delta serves 128 international destinations worldwide.
Delta offers great connectivity in the East Coast and Southeastern United States. It serves 341 destinations worldwide, which includes 213 domestic locations. Delta’s major hubs, including Atlanta, Salt Lake City, and New York-JFK, are generally regarded as more efficient and less prone to congestion than some competing hubs.
United
United Airlines has a considerably more extensive flight network than Delta, both domestic and international. It flies to 380+ destinations in over 60 countries, which includes 167 international destinations.
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United Airlines is one of the founding members of the Star Alliance, which is the largest airline alliance in the world, with 44 member carriers including Lufthansa, Swiss Airlines, and Singapore Airlines. The Star Alliance network covers 190 countries.
United Airlines benefits from more airline partnerships, a larger domestic route network, and stronger international coverage.
2. Comparing Loyalty Programs
Which airline provides better perks for frequent flyers? Let’s compare the loyalty programs between Delta vs. United Airlines.
Delta
Both Delta SkyMiles and United miles are worth approximately 1.2 cents per mile. The SkyMiles loyalty program allows passengers to book flights and buy perks across the SkyTeam alliance. This program uses fully dynamic pricing, which means that the miles needed for a flight can fluctuate from day to day.
SkyMiles provides access to Virgin Atlantic Flying Club, through which passengers can redeem Delta flights at a discounted rate. Additionally, Delta partners with American Express to offer seven types of credit cards, each of which includes passenger perks like a free checked bag and discounts.
The most expensive Delta credit card includes unlimited entry to American Express Centurion Lounges with certain limitations and limited access to the Sky Club lounge. They also offer an annual companion certificate and elite status credit.
United
At 1.2 cents per mile, United offers the same redemption value as Delta SkyMiles. The United MileagePlus program allows loyalty program members to redeem flights across the Star Alliance, which is the world’s largest airline alliance.
Other perks of MileagePlus include no fuel surcharges on partner awards, which means you can redeem flights through Lufthansa, Turkish Airlines, Air Canada, and other partner airlines and save money on extra fees.
Several United Chase-branded credit cards allow cardholders to earn Premier Qualifying Points that can help toward elite status qualification. In particular, the United Explorer credit card includes a free checked bag for the primary cardholder and one traveling companion.
3. Comparing Reliability
Reliability is one of the strongest factors influencing most airline loyalty decisions. Most passengers expect their airline to offer consistent services and minimize the probability of issues like lost baggage and flight cancellations.
Delta
Delta has historically reported fewer delayed flights, canceled flights, and mishandled baggage claims than many competitors. It has consistently ranked among the most reliable U.S. carriers for on-time performance. Delta is widely regarded for its customer service and consistently receives strong passenger satisfaction ratings.
United
United has significantly improved its on-time performance in recent years. It has a track record of most flights operating on time but has a higher rate of misplaced baggage claims.
4. Comparing Additional Fees
Which airline do you pay lower fees at? Overall, Delta wins in this segment because of the lower seat selection fees.
Delta
Basic Economy passengers can pay a fee to select a seat, while other fares get complimentary seat selection. All passengers are randomly assigned seats at check in. Delta charges an average seat selection fee of $24.99 (source: nerdwallet).
On domestic flights, Delta charges $45 for a single checked bag and $55 for a second one. However, Delta allows passengers to bring a single carry-on bag for free, as long as it fits in the overhead bin.
Delta doesn’t usually charge change fees for US-based itineraries.
United
United Airlines doesn’t charge change fees for most domestic flights. Basic economy carry-on bag fees for United Airlines are $45 if you prepay and $50 if you choose to pay later at the airport. You may be exempt from paying this fee if you are an elite member or have credit card benefits.
Most fare types get free seat selection as a standard. Basic economy passengers and travellers using Polaris or Premium Plus fare types must pay an average seat selection fee of $58.49 to change or select a seat (source: nerdwallet).
5. Comparing Basic Economy Tickets
Basic economy gives you all the basics, no frills or fancy treatment. If you’re looking for the best airline to fly economy, here’s a side-by-side comparison of the two.
Delta
Delta basic economy fare allows you to bring one carry-on bag and personal item on your flight for free. Basic economy passengers don’t earn any redeemable miles or credits and can’t use Delta Sky Clubs. On average, Delta offers more comfortable seating, better upholstery, and overall better amenities.
United
United Airlines only allows you to carry a personal item free of charge. No free carry-on is included unless you’re a MileagePlus Premier member, have credit card benefits, or are flying a transatlantic. Passengers flying basic economy with United can earn redeemable miles as well as Premier Qualifying Points.
The Experience of Flying Delta
Many travelers view Delta’s customer service and onboard experience more favorably than United’s. Delta modernized much of its fleet earlier than United, and offers seatback entertainment screens on nearly all aircraft, with the Boeing 717 fleet being a notable exception.
Delta is widely regarded as a strong all-round carrier that delivers a more “premium” experience than its competitors. Delta has greater control over its airport hubs, which can contribute to a more consistent travel experience. If you live near a Delta hub or really value consistent quality, Delta should be your airline of choice.
The Experience of Flying United
United Airlines is one of the largest carriers in the U.S. They offer a solid onboard experience and serve more domestic airports than Delta.
If you’re flying internationally, United might be the better choice in 2026. Not only does it have better connectivity because of the Star Alliance, MileagePlus is often regarded as a versatile airline loyalty program for international travelers.
Concluding Thoughts
TThere is no clear winner between Delta and United Airlines in 2026. Delta is known for its on-time flights, smooth domestic travel, and excellent customer service. On the other hand, United excels in route coverage, international connectivity, and loyalty program flexibility.
Travelers who prioritize a smooth domestic travel experience may prefer Delta, whereas frequent international flyers may find United to be the stronger option.
Frequently Asked Questions
Between United vs. Delta airlines, which is better in 2026?
The better choice between Delta airlines and United airlines depends on how frequently you fly, the credit card rewards you’re interested in, and where you are flying to.
Which airline is better for international travel?
United Airlines is better than Delta for international travel since it serves more international destinations and partners with more international carriers across the world.
Does Delta or United offer better basic economy tickets?
Both Delta and United offer similarly priced economy tickets. Delta allows you to bring a check-on bag for free and United economy passengers still earn award miles on their fare and loyalty status.
Is Delta more reliable than United?
Overall, Delta is more reliable than United Airlines since it reports more on-time flights, fewer delays, and better baggage handling.
Which airline has lower baggage fees: Delta vs. United?
Delta has lower baggage fees for standard domestic and short-haul international flights. For most Main Cabin economy tickets, Delta charges $45 for the first bag and $55 for the second bag, while United charges $50 for the first bag and $60 for the second.
