The 2026 inter-island price floor now sits at $49 each way — up from the $29 promotional fares that drew crowds of budget island-hoppers between 2019 and the mid-2020s. That shift isn’t just a headline number. It reflects a genuine structural change in Hawaii’s inter-island aviation market following the Alaska-Hawaiian merger finalized in April 2026, Southwest’s capacity cuts, and the end of the fare war that briefly made hopping between Maui and Kauai cheaper than a tank of gas. This guide breaks down what each carrier actually charges in 2026, how to read the total cost rather than the ticket price, and which airline makes sense depending on how you travel.
The useful frame here isn’t “which airline is cheapest” — it’s “which combination of fare, bags, and routing costs the least for your specific trip.” Those are different questions, and the answer changes depending on whether you’re carrying luggage, how far out you book, and whether your itinerary routes through Honolulu or not.
Summer 2026 peak-week inter-island fares consistently cluster between $150 and $180 each way — more than triple the $49 price floor and roughly double what travellers paid during the 2019–2022 fare war.
For most travellers in 2026, Southwest and Hawaiian are priced within a few dollars of each other on the same routes — so the real decision is bags and flexibility, not fare. Southwest’s bag policy changed in May 2025: visitors now pay $30 for the first checked bag and $40 for the second, matching Hawaiian’s fees. If you’re travelling light with a carry-on, either carrier works. If you’re hauling luggage, neither is the bargain it once was. One genuine caveat: Southwest has cut roughly 30% of its inter-island capacity since early 2025, so schedules are thinner — especially on less-trafficked routes.
The Three Carriers Flying Between the Islands
Frequent-flyer maximisers
Budget travellers watching bag fees
Remote island access (Molokai, Lanai, Hana)
Hawaii’s inter-island market runs on three airlines with genuinely different operating models. Hawaiian operates roughly 170 daily inter-island flights on Boeing 717 jets, connecting Honolulu, Kahului, Lihue, Kona, and Hilo. Despite the Alaska Air Group acquisition completing in May 2026 under a single operating certificate, the planes, crews, and branding remain Hawaiian — including the POG juice service that’s become a reflex for residents flying home. Flights depart every 30 to 60 minutes on the busiest routes, which makes Hawaiian the most operationally flexible choice if plans change.
Southwest flies 737s between the same five main airports, but not all routes operate daily and schedules shift by season. After cutting roughly 30% of inter-island capacity since early 2025, there are fewer Southwest options on some route pairs than there were two years ago. Mokulele is the third piece: nine-seat Cessna Grand Caravans reaching Hana and Kapalua on Maui, Lanai City, and both Hoolehua and Kalaupapa on Molokai — places the jets simply don’t go. On Mokulele, passengers check in at small commuter counters, walk across the tarmac, and are weighed along with their bags, which is worth knowing before you pack.
Daily inter-island flights operated by Hawaiian Airlines — more than Southwest and Mokulele combined.
The practical shape of the market in 2026 is that the Alaska merger removed pressure on Hawaiian to discount. Southwest stopped its deep fare sales around the same time it cut capacity. The result is a market where walk-up fares around $150 each way have been reported as recently as April 2026 — and where one Honolulu to Kahului round trip reportedly topped $600. The $39 fare war era is genuinely over.
Carrier Profiles: What Each One Actually Offers
Hawaiian Airlines — Coverage and Consistency at a Price
Hawaiian’s Boeing 717 is configured in a 2×3 economy layout with a seat pitch of 30–31 inches, tighter than Southwest’s 737 MAX 8 which runs 32 inches in a 3×3 layout. For a 35-minute Honolulu to Kahului flight, that difference rarely matters. What does matter: Hawaiian offers assigned seating, and booking further out gives more free seat selection. For groups or families needing to sit together, that’s a meaningful advantage over Southwest’s open boarding system, where a low boarding position on a full flight can push you to the back of the cabin.
Standard one-way fares typically sit between $139 and $179. Hawaiian charges $30 for a first checked bag and $40 for a second — though a free Atmos Rewards account trims those to $25 and $35. HawaiianMiles members also see reduced fees, and premium status or the branded credit card can waive them entirely. Hawaiian’s 717 aircraft don’t offer USB charging or Wi-Fi on inter-island routes, and there’s no announced plan to add either. What you do get is a complimentary drink — POG or coffee — on every flight, even on a 25-minute hop to Kauai.
Southwest — The Shifting Value Equation
Southwest entered Hawaii’s inter-island market in March 2019 with $29 fares and immediately forced Hawaiian to compete. That competitive pressure is gone. Southwest fares now typically range from $39 to $99, but base fares frequently land within a few dollars of Hawaiian’s on the same routes. The airline’s two-free-bags policy — long its clearest differentiator — changed in May 2025: visitors now pay $30 for the first bag and $40 for the second. Hawaii residents with a Hawaii address on their Rapid Rewards account still check two bags free, but that exemption doesn’t help most mainland visitors.
Southwest does offer $8 Wi-Fi on inter-island flights and is in the process of adding USB-A and USB-C chargers at every seat. For rebooking flexibility, Southwest remains easier to work with: Hawaiian’s fund re-deposit process is notably less straightforward. Southwest doesn’t offer seat assignments, which works fine for solo travellers with early boarding but creates friction for groups at peak times.
On Southwest inter-island flights, check in exactly 24 hours before departure to maximize boarding position — at popular morning departure times from Kahului, A-group spots fill within the first 10 minutes of check-in opening.
Mokulele — For Places the Jets Don’t Reach
Mokulele’s nine-passenger Cessna Grand Caravans connect Hana airport on east Maui, Kapalua on Maui’s west side, Lanai City, and both Hoolehua and Kalaupapa on Molokai — routes that define whether these communities have air service at all. Parent company Surf Air Mobility is putting roughly $22 million into the Hawaii operation through 2026. Spring 2026 sale fares ranged between $44 and $89 on routes like Lanai to Kahului, but Mokulele prices its routes independently from the main carriers and schedules can be thin.
The boarding experience is completely different from Hawaiian or Southwest: no security theatre at small commuter terminals, straight across the tarmac, and into a plane where you sit close enough to see the instrument panel. Passengers and bags are weighed together, which Mokulele uses for weight-and-balance calculations — it’s standard practice on small turboprops but catches first-timers off guard. The Honolulu to Molokai route is now one of the most frequently flown routes of any U.S. airline by departure count, which reflects how essential Mokulele is to that community rather than tourist demand. You can explore more about reaching the Big Island’s more remote experiences once you land at Hilo or Kona.
Timing, Pricing, and the Bag Fee Trap
What Fares Actually Look Like by Season
Winter low-season windows — January through February — can drop fares to the $70–$130 range on both major carriers. Summer 2026 peak weeks cluster between $150 and $180 each way. The most useful rule of thumb: book a month or more ahead and most routes land between $80 and $120. Book within a week or two and plan on roughly $150 each way. The cheapest booking days are consistently Tuesday and Wednesday.
Inter-island fares in summer 2026 are broadly expected to sit between $100 and $200 each way, depending on route and timing. That range has effectively replaced the old $39–$99 band that Southwest made the market standard. The higher floor is a direct consequence of the Alaska-Hawaiian merger removing the competitive pressure that kept Hawaiian discounting, combined with Southwest’s capacity cuts reducing the supply of cheap seats.
| Carrier | Typical Fare Range (2026) | First Bag | Second Bag | Wi-Fi | Seat Assignment |
|---|---|---|---|---|---|
| Hawaiian Airlines | $139–$179 one-way | $30 ($25 with Atmos) | $40 ($35 with Atmos) | No | Yes (free) |
| Southwest | $39–$99 one-way | $30 (visitors) | $40 (visitors) | $8 | No (open boarding) |
| Mokulele | $44–$89 (sale fares) | Varies | Varies | No | N/A (9-seat caravan) |
The Total Cost Calculation Most Travellers Miss
The bag fee math matters more than it used to, because the gap between base fares and true cost has widened. A $139 Hawaiian fare with one checked bag is effectively $169. A $90 Southwest fare with two checked bags is $150. On many route and date combinations, the “cheaper” carrier ends up costing the same or more once bags are factored in. The only travellers for whom this calculation still clearly favours Southwest are Hawaii residents with a Rapid Rewards account, who still check two bags free.
Southwest ended its two-free-bags policy for visitors in May 2025 — a change that’s not always reflected in fare comparison tools. Both Southwest and Hawaiian now charge visitors $30 for the first bag and $40 for the second, which can make a low base fare comparison meaningless if you’re checking luggage.
Routing: The Honolulu Hub and When It Hurts
Most inter-island flights route through Honolulu, which turns a 30-to-40-minute air segment into a much longer travel day. A connection over Honolulu between Maui and Kauai can easily become a three-hour-plus travel block once you factor airport time on both ends. Direct routes between neighbor islands — Kahului to Kona takes 30–35 minutes nonstop, Kahului to Lihue around 40 — exist but aren’t always available on every carrier for every date. Checking for direct service first is worth the extra search time, especially if your itinerary crosses multiple islands.
What to Know Before You Fly
Packing Strategy and Luggage
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With both major carriers now charging visitors $30 per checked bag each way, the economics of island-hopping shift noticeably if you’re doing multiple flights. On a four-island trip with one checked bag, you’re paying $240 in bag fees alone across eight flight segments. Travelling with a hard-shell carry-on that genuinely fits overhead and holds a week’s worth of clothes becomes more financially relevant than it used to be. A lightweight hardside carry-on set can pay for itself on a single multi-island trip if it keeps you out of the checked bag line on every flight. The calculation is straightforward: four round-trip inter-island segments with one checked bag each way costs $240 at current rates.
On Mokulele specifically, the weight-and-bag calculation works differently. Passengers are weighed with their luggage for the nine-seat Cessna Grand Caravans, so overpacking for a Mokulele leg affects more than overhead bin space.
Booking Strategy and Loyalty Accounts
Booking a month or more ahead brings most inter-island fares to the $80–$120 range, compared to roughly $150 walk-up for the same routes. Creating a free Hawaiian Atmos Rewards account before booking also reduces bag fees from $30/$40 to $25/$35 per bag — a minor but real saving that takes about two minutes to set up. Interisland segments earn at least 500 points per flight, which adds up across a multi-island itinerary. HawaiianMiles members with premium status or the branded credit card can waive bag fees entirely, making Hawaiian the clearly better option if that status is already in play.
For rebooking flexibility — illness, changed plans, weather — Southwest remains the easier carrier to work with. Hawaiian’s fund re-deposit process is less straightforward, which matters more on a Hawaii trip where plans are more likely to shift around weather or activity availability than on a straightforward mainland business itinerary.
- Southwest ended its two-free-bags policy for visitors in May 2025 — both carriers now charge $30/$40 per bag, so compare total cost including luggage, not just base fare.
- A free Hawaiian Atmos Rewards account reduces bag fees to $25/$35 per bag on neighbor island flights — takes two minutes and applies immediately.
- Mokulele is the only scheduled carrier reaching Hana, Kapalua, Lanai City, and Molokai’s Kalaupapa — there’s no jet alternative for those destinations.
- Booking four or more weeks out typically saves $30–$70 per segment compared to booking within two weeks, across both major carriers.
Questions Travellers Ask About Hawaii Inter-Island Flights
Is Southwest still cheaper than Hawaiian for inter-island flights?
Rarely, in 2026. Base fares frequently land within a few dollars of each other on the same routes, and Southwest’s two-free-bags advantage for visitors ended in May 2025. The clearest remaining Southwest advantage is rebooking flexibility — funds are easier to redeposit and reuse than on Hawaiian.
Southwest’s capacity cuts since early 2025 also mean fewer schedule options, particularly on less-trafficked routes. If Hawaiian has a more convenient departure time and the fares are close, Hawaiian is the more reliable choice for most travellers.
How much should I budget for inter-island flights in 2026?
Plan on roughly $80–$120 per segment booked a month or more out, and around $150 per segment if booking within two weeks. Summer peak weeks and holidays push fares to $150–$180 or higher. Add bag fees on top: $30 for the first checked bag and $40 for the second on both Hawaiian and Southwest for visitors.
A two-island trip with two passengers and one checked bag each, booked four weeks out, realistically costs $320–$480 in flights and bag fees combined — not including the return mainland segment.
What’s the honest downside of booking the cheapest inter-island fare?
Sale fares at the low end of Southwest’s $39–$99 range carry the most schedule risk — they’re often on thinner-capacity days or less convenient times, and Southwest’s reduced inter-island network means changes are harder to absorb. Missing a connection over Honolulu on a discounted fare can turn a 40-minute hop into a full-day ordeal.
The other trap is ignoring bag fees. A $49 fare with two checked bags is a $129 fare in practice — and that math compounds across a multi-island itinerary in ways that aren’t visible in standard fare search results.
When does Mokulele make sense over Hawaiian or Southwest?
Whenever your destination is Hana, Kapalua, Lanai City, Hoolehua, or Kalaupapa — Mokulele is the only option. For those routes, there’s no comparison to make. The nine-seat Cessna Grand Caravans provide essential air connectivity to communities that jets don’t serve, and the experience of checking in across a tarmac without a security queue has its own appeal.
For standard airport-to-airport travel between the main islands, Mokulele’s spring sale fares of $44–$89 can undercut both major carriers when available — but schedules are less frequent and the weight-with-bags check-in adds a variable that doesn’t exist on jet carriers.
The honest summary of inter-island flying in 2026 is that the market has consolidated around a higher floor — and the traveller decisions that once felt minor (loyalty accounts, bag policies, booking timing) now carry more financial weight than they did during the fare-war years. The one detail worth sitting with: the Honolulu to Molokai route is now reportedly one of the most frequently operated routes of any U.S. airline, which says less about tourism and more about the reality that a nine-seat propeller plane is still the primary lifeline connecting some Hawaiian communities to the rest of the state. If this was useful, you might also enjoy reading about what to do once you land on the neighbour islands.
Sources and further reading
2026 Hawaii inter-island flight pricing: the real cost guide. CPO Box, 2026.
Southwest vs Hawaiian: comparing Hawaii inter-island flights amid rising prices. Beat of Hawaii.
Hawaii inter-island flights guide. Hotel Hawaii.
Inter-island flights 2026. Love Big Island, verified June 2026.