Hawaiian Airlines vs. Southwest vs. Mokulele for Interisland Flights: An Honest Comparison

The announcement that Hawaiian Airlines is investing $600 million into fleet and terminal upgrades signals just how much the interisland flying landscape has shifted in 2026. The era of $29 walk-up fares is gone — the realistic one-way floor now sits around $49, and standard tickets on Hawaiian regularly land between $139 and $179. For families trying to stretch their Hawaii budget without wasting a day in transit, the choice between Hawaiian, Southwest, and Mokulele affects more than just the price displayed on the booking page.

This article breaks down the three carriers — their fares, baggage policies, route networks, and scheduling quirks — so you can match the right airline to your specific itinerary. I’ll also flag where each one tends to frustrate travelers, because knowing the downside is just as important as knowing the advertised price.

Each row above is a starting point, but the real math changes once you account for how many bags your group needs, how flexible your dates are, and whether Honolulu is actually on your route.

Hawaiian Airlines — Frequency and Reliability at a Premium

With around 170 daily interisland flights operated by 19 Boeing 717s, Hawaiian remains the backbone of island-to-island travel in 2026. Its schedule runs every 30 to 60 minutes on busy routes like Honolulu to Kahului, which means if you miss a flight, another one is usually within the hour. That kind of frequency matters when you’re trying to connect from a mainland red-eye or squeeze a full day out of a short visit.

The trade-off is price. Standard one-way fares sit between $139 and $179, and checked baggage adds $30 for the first bag and $40 for the second. For a family of four with two checked bags each way, that’s an extra $60 to $80 on top of an already expensive ticket. Hawaiian completed its merger with Alaska Airlines in April 2026, and the two carriers now offer unified baggage policies, though interisland bag fees remain separate from mainland rates.

On the reliability front, Hawaiian posted a cancellation rate of 0.82% for the full 2025 calendar year, per US DOT data — marginally better than Southwest’s 0.85%. But interisland legs are more prone to weather-related delays than mainland routes, especially in the afternoon when trade winds pick up over the channels between islands. If you’re connecting to an international flight out of Honolulu, give yourself a buffer of at least four hours.

If your itinerary links multiple islands in a single trip, Hawaiian’s dense hub at Honolulu makes it the easiest airline for same-day connections. The downside is that almost everything routes through HNL, so a direct neighbor-island flight like Kahului to Lihue still requires a stop at the main hub.

Southwest Airlines — Lower Base Fares, Thinner Schedule

Southwest entered the Hawaii market in March 2019 and quickly became the price leader on interisland routes, with one-way fares ranging from $39 to $99. But the picture has changed since early 2025, when the airline reduced interisland capacity by roughly 30%. Load factors on routes like Kahului to Lihue dipped as low as 32%, and the schedule today is noticeably thinner than it was two years ago.

The biggest practical win for families: Southwest still offers two free checked bags for certain fare classes and loyalty tiers, though the airline ended its “Bags Fly Free” policy for most fares on May 28, 2025. Passengers with A-List Preferred or Business Select status, as well as Rapid Rewards Premier credit card holders, still get free bags. For everyone else, the first checked bag costs $45 and the second $55 on mainland routes, though the interisland-specific policy has been folded into the post-merger alignment with Hawaiian.

Southwest does not serve Hilo, which limits its usefulness for travelers wanting to see the Big Island’s east side. It also has fewer daily frequencies than Hawaiian on every interisland route, so if you miss a Southwest flight, the next one could be several hours later.

The cancellation rate for 2025 was 0.85%, essentially tied with Hawaiian. But the thinner schedule means a canceled Southwest flight has a bigger impact on your day than a canceled Hawaiian flight, simply because there are fewer rebooking options. Honolulu Airport has faced recent flight cuts across multiple carriers, which compounds the risk for travelers trying to piece together same-day connections.

Southwest makes the most sense for price-sensitive travelers who can pack light enough to avoid checked-bag fees entirely, or who hold A-List status and can use the free bags to offset the fare advantage. Midweek departures on Tuesday or Wednesday can save 30 to 40 percent compared to weekend flights.

Mokulele Airlines — The Only Way to Reach the Small Airports

Mokulele fills the gaps the bigger carriers don’t cover. Operating nine-seat Cessna Grand Caravans, it connects Kapalua and Hana on Maui, as well as Molokai and Lanai, with 2026 spring sale fares ranging from $44 to $89 on routes like Lanai to Kahului. If your itinerary includes any of those smaller airports, Mokulele is your only option — neither Hawaiian nor Southwest flies into them, and the drive between Kahului and Hana takes three hours each way.

The trade-off is the plane itself. A nine-seat single-engine turboprop is a different experience from a Boeing 717: you’ll feel the wind, the cabin isn’t pressurized, and weight limits are strict. Each passenger is weighed at check-in, and the pilot balances the load before departure. Carry-on space is extremely limited — think backpack, not roller bag. If you or your kids are nervous about small aircraft, this is worth factoring into your decision.

Mokulele’s schedule is limited compared to the main carriers — most routes have only a few departures per day — so you’ll need to plan around their timetable rather than the other way around. The upside is that the check-in process is faster: at smaller airports like Kapalua, you can walk from the curb to the gate in under ten minutes, which shaves off the typical three-hour door-to-door window that Hawaiian and Southwest require.

If your group includes very young children or travelers with mobility issues, the small-plane experience can be tight. The low-altitude route does mean spectacular views of the channels and coastline — the kind of aerial perspective that even the Sphere show in Las Vegas can’t replicate — but it’s worth booking a morning flight when winds are calmer and turbulence is less likely.

Booking and Routing Strategy for Interisland Flights

The smartest approach to booking interisland flights in 2026 starts with two decisions: which islands you’re visiting and whether you can route through Honolulu or need a direct neighbor-island connection. Once those are clear, the right airline choice usually follows naturally.

Practical Section: Costs, Baggage, and Scheduling Decisions

The one number that matters most for most families is the total trip cost per person, not the advertised fare. Here’s how the three carriers stack up on the expenses that actually determine your outlay.

When to pick Hawaiian over Southwest

If your itinerary involves two or more interisland flights in a single day — say, Honolulu to Kona in the morning, then Kona to Kahului in the afternoon — Hawaiian’s frequency means you won’t be stranded if the first leg is delayed. Hawaiian’s cancellation rate is slightly lower (0.82% vs 0.85%), but the larger advantage is schedule density: on busy routes, you’re never more than an hour from the next departure.

When to pick Southwest over Hawaiian

If you’re traveling with only carry-on bags and can book midweek, Southwest’s base fares are genuinely cheaper, and the larger carry-on allowance (24 × 16 × 10 inches vs Hawaiian’s 22 × 14 × 9) makes it easier for families to avoid checked bags entirely. The catch is that Southwest’s reduced capacity means fewer departure options, so if your schedule is fixed, book early.

When Mokulele is the only choice — and why it’s worth it

For Kapalua, Hana, Molokai, or Lanai, there is no alternative. The trade-off is worth making if your trip centers on those destinations, especially Molokai or Lanai, which see far fewer visitors than the main islands. If you’re still weighing which side of the island to sleep on, this interactive map of the island’s hotels and rentals makes it easier to compare proximity to smaller airports versus the main hubs.

Before You Go: Interisland Flight Questions Answered

Which airline has the lowest total cost for a family of four?

For a family checking two bags on a round-trip, Southwest’s base fare with no bag fee for loyalty holders is cheapest. Without loyalty status, Hawaiian’s $30 first-bag fee on interisland fares can make it cheaper than Southwest’s $45 general bag fee, especially if the base fare gap is narrow on midweek dates.

Can I fly directly from Kahului to Lihue without going through Honolulu?

Yes, but only on select airlines and schedules. Southwest operates Kahului–Lihue direct, though capacity on that route has been cut. Hawaiian routes most neighbor-island pairs through HNL. The flight time is roughly 40 minutes when direct.

How early should I arrive for an interisland flight?

For Hawaiian and Southwest at main airports, arrive 90 minutes before departure. For Mokulele at smaller airports like Kapalua or Hana, 30 minutes is usually enough. The full door-to-door window — hotel to rental car on the other side — runs about three hours regardless of the flight time.

What happens if my interisland flight is canceled?

Hawaiian offers same-day rebooking on the next available flight, which is often within the hour on busy routes. Southwest has fewer daily frequencies, so a cancellation can mean a several-hour wait. Mokulele’s limited schedule makes cancellations more disruptive — always book the first morning flight, which has the lowest probability of weather-related issues.

Is it worth booking interisland flights separately from my mainland ticket?

Yes, if you’re willing to recheck bags at Honolulu. Separate bookings almost always cost less than the bundled option, and they give you the flexibility to pick the best carrier for each leg. The trade-off is that the airline isn’t responsible for missed connections between separate tickets.

Choosing What Fits Your Trip, Not Just Your Budget

I’ve bookmarked all three carriers’ pages over the years, and the one I use most depends entirely on the trip. For a quick weekend on Maui with just backpacks, Southwest’s lower fare makes it a clear winner. For a multi-island run with tight connections — the kind where missing a flight unravels the whole week — Hawaiian’s density is worth every dollar. And for reaching somewhere like Lanai or Hana, Mokulele isn’t a compromise; it’s the only way there, and the low-altitude views over the channel are genuinely something you won’t forget. The best family resorts on each island tend to cluster near the airports that match the carrier serving them, so lining up the two decisions early saves a lot of backtracking later.

References

Hotel Hawaii Org. “Hawaii Inter-Island Flights Guide: The Complete Guide to Island Hopping in 2026.” Hotel Hawaii, 2026. ↗

Cpobox. “2026 Hawaii Inter-Island Flight Pricing: The Real Cost Guide.” Cpobox, 2026. ↗

Travel Vient. “Hawaiian vs Southwest: Quick Verdict and Comparison.” Travel Vient, 2026. ↗

Hawaii Guide. “Interisland Flights in Hawaiʻi: How to Island-Hop Like a Pro.” Hawaii Guide, 2026. ↗

Beyond the numbers above, I’ve written more about how the shifting flight schedules affect travel to specific islands — the 2026 cruise tax halt changed how some families reach interisland ports, and the outdoor activity trends on each island can help you decide which one deserves the most days. If you’re still sorting out where to base your trip, those posts run through the pros and cons of each option in more detail.