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How to Buy a de Havilland DHC-6 Twin Otter: Buyer's Guide
A rugged, twin-turbine STOL utility hauler that lands almost anywhere and holds value. Buy it on records, corrosion, and engine status, not year.
Updated October 2026 · Market data from 14 live fyiAero listings, the FAA registry and NTSB records
Overview
The de Havilland Canada DHC-6 Twin Otter is the go-to twin-turboprop for short, rough, wet, and cold places. It first flew in the mid-1960s. With a high wing, fixed gear, two Pratt & Whitney PT6A engines, and a big boxy cabin, it has served airlines, skydiving operators, survey companies, governments, and polar expeditions for decades. You can put it on wheels, skis, straight floats, or amphibious floats, and the airframe was built to take a beating.
Most airplanes you will find for sale are original-production Series 100 and Series 300 aircraft. A handful are upgraded or remanufactured 300s and newer Series 400s. fyiAero listings currently show 14 Twin Otters for sale against a U.S. registered fleet of 119 aircraft, according to the FAA registry. The listed models are mostly -300s, plus several -100s, a few aircraft marketed as Twin Otter X2 upgrades, and a single -400.
These are working airplanes, and high time is normal. The median airframe time across fyiAero listings is 31,408 hours. That number does not scare experienced Twin Otter buyers, because value depends far more on structural condition, corrosion history, maintenance program, and engine and propeller status than on calendar age or total time.
Who it's for. The Twin Otter suits commercial and quasi-commercial missions: skydiving, Part 135 passenger and cargo work, float and remote-area operations, survey and special-mission work, and well-funded private owners who need STOL access with twin-engine redundancy and a large cabin. It is not a first turbine airplane for a low-time private pilot. Insurers will want substantial multi-engine and turbine time, and they typically require recurrent training at a Twin Otter-specific program, especially for float or amphibious operations. Many operators fly it single-pilot, but crew requirements depend on how and where you operate, and insurance underwriters often set the real minimums. Get insurance quotes and confirm your pilot qualifications before you make an offer.
Generations and variants
| Version | Years | What changed |
|---|---|---|
| DHC-6 Series 100 | 1965-1968 | The original short-nose version with lower-powered PT6A-20 engines and modest useful load. These usually trade at the lower end of the market unless they have been heavily upgraded, and buyers should check which later-series modifications have been incorporated. |
| DHC-6 Series 200 | 1968-1969 | Same engines as the 100 but with an extended nose and larger aft baggage area for more cargo space. They are uncommon on the market and priced much like comparable 100s, with value driven mainly by condition and mods. |
| DHC-6 Series 300 | 1969-1988 | The definitive classic Twin Otter, with more powerful PT6A-27 engines, higher gross weight, and the long nose. It is the most common version for sale and the benchmark for the used market, with prices that swing widely on engine times, structural refurbishment, and avionics. |
| Upgraded / remanufactured 300s (including X2-marketed aircraft) | 1969-1988 airframes, modified later | Some 300s have been refurbished or modified with engine, avionics, structural, or interior upgrades and are marketed under names such as Twin Otter X2. Ask exactly which STCs and work packages are included, because the label alone tells you little and the paperwork drives the premium. |
| DHC-6 Series 400 | 2010-present | A new-production Twin Otter revived by Viking Air, now De Havilland Canada. It has PT6A-34 engines, an integrated glass cockpit, composite secondary structures, and modernized systems. It commands the top of the market and rarely appears for sale. |
What a de Havilland DHC-6 Twin Otter costs to buy
1 priced listings on fyiAero right now ask between $1,365,000 and $1,365,000, with a median of $1,365,000 and a median of 31,408 hours total time.
- Public pricing is thin. Only one fyiAero listing currently shows an asking price: a 1967 airframe at $1,365,000. Treat that as a single data point, not a market average, and expect most sellers to quote price on request.
- Do not shop by year. With a median listed airframe time of 31,408 hours, nearly every classic Twin Otter is high-time. Corrosion history, structural repairs, and refurbishment records matter far more than the build date.
- Engine and propeller status is a major value driver. Price each airplane on time since overhaul and hot section, and on any calendar limits, because two PT6 overhauls and two prop overhauls add up to a large share of the purchase price.
- Know the operating history. Aircraft from saltwater float, tropical, or high-cycle skydiving operations can be excellent or badly worn. Ask for the maintenance program the airplane was on and get complete logbooks back to new if possible.
- Mods should be documented, not just described. Engine upgrades, avionics, ADS-B, STOL or float kits, and structural programs add value only with complete STC paperwork, field approvals, and weight-and-balance records.
- Budget for repositioning, import or export, and conformity work. With 119 U.S.-registered aircraft and a global fleet, many good airplanes are overseas, and bringing one onto the U.S. registry takes time and money.
Pre-buy inspection checklist
Have a shop that knows the type do the pre-buy, and ask them to research every applicable AD and service bulletin. Pay particular attention to:
- Corrosion survey of the entire airframe. Float, coastal, and tropical operations are common for this type. Have the shop open panels and inspect the belly, lower fuselage frames, floorboards, wing and strut fittings, and tail structure for corrosion and past repairs.
- Wing, strut, and attach fittings. The strut-braced wing carries heavy loads in rough-field and float use. Fittings, strut ends, and spar areas need close inspection and NDT where required, and the shop should research applicable ADs and SBs for wing structure.
- Structural repair and damage history. Hard landings, ground handling incidents, and float or ski mishaps are common in utility service. Confirm that every major repair has proper approval data and look for undocumented skin or frame work.
- PT6A engines: borescope, hot section, and trend data. Each engine's condition dramatically affects value. Request trend monitoring data, a borescope inspection, compressor and turbine condition, and verification of overhaul and hot section times and any calendar limits.
- Propellers and governors. Check prop overhaul status, blade erosion and damage, de-ice boots if installed, and governor, feather, and reversing operation. Prop work on two engines is expensive.
- Landing gear and gear attach structure. The fixed gear absorbs a lot of punishment on unprepared strips. Inspect the legs, attach points, brakes, and wheels, and on float or amphibious aircraft inspect float attach fittings and float structure.
- Flight controls, flaps, and trim systems. Check cable condition, pulleys, flap tracks and actuation, and control surface hinges and balance. Wear is common on high-cycle aircraft such as skydiving platforms.
- Logbooks, inspection program, and life-limited parts. Verify that the aircraft has been maintained on a recognized inspection program, that life-limited components are tracked and within limits, and that the shop has researched all applicable ADs and SBs.
- Electrical system, wiring, and avionics. Older airframes can have aged wiring and a patchwork of avionics installations. Inspect wiring harnesses and confirm that avionics, autopilot, and ADS-B installations have proper approvals.
- STC and modification paperwork. Many Twin Otters carry multiple STCs for engines, avionics, floats, interiors, and role equipment. Missing paperwork can ground the aircraft or cut its value at resale.
Popular upgrades
- Engine upgrades. STC'd conversions to more powerful PT6A variants improve hot-and-high and heavy-load performance. They add value when done recently and fully documented, but confirm overhaul status and approvals.
- Glass cockpit and ADS-B avionics. Modern panels with GPS navigation, autopilot, and ADS-B Out are increasingly expected. An upgraded panel makes an airplane noticeably easier to sell and insure.
- Structural refurbishment or rewing programs. Programs offered through the type certificate holder and other approved shops can extend airframe life. Airplanes with completed structural work command a premium over comparable unrefurbished aircraft.
- Floats, amphibious floats, and skis. Float and ski installations broaden mission capability and appeal to specific buyers. Float-time history also raises corrosion questions that the buyer must investigate.
- Role equipment and interiors. Skydiving doors and interiors, cargo configurations, executive or passenger interiors, and survey equipment add value only to buyers who need that role. Expect conversion costs if your mission differs.
Ownership costs
No reliable operating cost estimate is available for the Twin Otter, so budget conservatively. Your biggest costs are fuel for two PT6 turbines, engine and propeller overhaul reserves on two of each, structural and corrosion inspections, and insurance. Hull premiums on a seven-figure airplane are significant, and liability coverage for passenger-carrying operations adds more. Parts and support are generally available because the type certificate holder still supports the fleet and the aircraft remains in active commercial service worldwide. Specialized structural work, however, can be costly and is often concentrated at a few experienced shops. Float or saltwater operations increase maintenance substantially. Ask the seller and a Twin Otter maintenance facility for actual fuel burn, hourly reserves, and recent annual or inspection invoices before you build a budget.
Safety record
NTSB records show 2 accidents involving U.S.-registered Twin Otters over the last 10 years, with no fatal accidents and no aircraft destroyed. Against a fleet of 119 aircraft, that works out to about 16.8 accidents per 1,000 registered aircraft over the decade and zero fatal accidents per 1,000. Keep in mind that the fleet is small, so a single event swings the rate, and these airplanes fly hard commercial missions into short, rough, and water landing sites. The type-specific risk areas are engine-failure handling at low speed and high weight, loading and center-of-gravity control (especially with cargo and skydivers), crosswind and gusty-wind handling given the large wing and slab sides, float and amphibious gear-position discipline, and icing awareness. Recurrent training at a Twin Otter-specific program is the best safety investment an owner can make.
Alternatives to consider
- Cessna 208 Caravan. Cheaper to buy and operate, with a single PT6 and a huge support network. It lacks the Twin Otter's twin-engine redundancy and true STOL performance.
- Daher Kodiak 100. A newer single-engine turboprop with excellent short-field manners and modern avionics. It has a smaller cabin, less payload, and only one engine.
- Pilatus PC-6 Porter. An outstanding STOL single-engine turboprop for very short strips. Its cabin and payload are much smaller, and it has no engine redundancy.
- Dornier 228. A faster twin turboprop with retractable gear and comparable seating. It needs longer runways, is less suited to rough strips, and has a thinner support base in the U.S.
- Let L 410. A larger twin-turboprop commuter with rough-field capability. It has limited U.S. presence and support, and uses different engines and systems that few U.S. shops know well.
Frequently asked questions
How much does a used Twin Otter cost?
Public pricing is scarce. The only fyiAero listing currently showing an asking price is a 1967 Twin Otter at $1,365,000. Most sellers quote on request, and actual prices vary widely with engine status, structural refurbishment, and avionics.
How many Twin Otters are for sale?
fyiAero listings currently show 14 Twin Otters for sale. Most are Series 300 aircraft, along with several Series 100s, a few X2-marketed upgraded aircraft, and one Series 400.
Is high airframe time a problem on a Twin Otter?
Not by itself. The median airframe time on fyiAero listings is 31,408 hours, which is typical for this working type. Condition, corrosion history, structural repairs, and documented maintenance matter far more than total time.
What is the difference between a Series 300 and a Series 400?
The Series 300 is the classic production model with PT6A-27 engines and original-style systems. The Series 400 is a modern new-production version with PT6A-34 engines, a glass cockpit, and updated systems, and it sells at a substantial premium when one is available.
Is the Twin Otter safe?
NTSB records show 2 accidents and no fatal accidents among U.S.-registered Twin Otters over the last 10 years, a rate of about 16.8 accidents per 1,000 aircraft. Given its demanding commercial missions, the type has a solid record, and type-specific recurrent training remains essential.
How many Twin Otters are registered in the U.S.?
The FAA registry lists 119 U.S.-registered Twin Otters. Many good aircraft are based overseas, so buyers often consider imports and should budget for the time and cost of registration and conformity work.
de Havilland DHC-6 Twin Otter for sale
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Prices, fleet and safety figures update automatically from fyiAero listings, the FAA aircraft registry and NTSB data. The editorial was written by fyiAero with AI assistance from that data and general type knowledge. It is not a substitute for a pre-buy inspection, title search or professional advice.
