When buying an aircraft, the transaction process usually involves several legal and operational steps. Two of the most important documents you will encounter are the Letter of Intent (LOI) and the Aircraft Purchase Agreement (APA).

Although they may seem similar at first glance, these documents serve very different purposes in an aircraft transaction. Understanding the difference between an LOI vs aircraft purchase agreement can help buyers and sellers avoid costly misunderstandings, protect their interests, and ensure a smooth closing process.

In this guide, we explain what each document is, how they differ, and why both play a critical role in a successful aircraft purchase.

What Is a Letter of Intent (LOI) in Aircraft Transactions?

A Letter of Intent (LOI) is an early-stage document used in aircraft transactions to outline the basic terms of a potential deal before drafting the full legal contract.

The LOI typically summarizes the buyer’s intent to purchase the aircraft and establishes preliminary terms that both parties can use as the foundation for further negotiations (AOPA, 2022).

An LOI is commonly used to:

1. Establish a proposed purchase price
2. Define the timeline for inspections and closing
3. Outline conditions of the pre-purchase inspection
4. Clarify how deposits will be handled
5. Set basic transaction milestones

In most aircraft transactions, the LOI is non-binding, meaning either party can walk away if issues arise during due diligence. However, certain provisions—such as confidentiality or exclusivity—may be legally binding (McAfee & Taft, 2020).

The purpose of the LOI is not to finalize the sale, but to ensure both buyer and seller agree on the main terms before spending time and money drafting a full purchase contract.

What Is an Aircraft Purchase Agreement (APA)?

The Aircraft Purchase Agreement (APA) is the formal, legally binding contract that governs the aircraft sale.

Unlike the LOI, the APA contains the complete legal framework for the transaction, including detailed obligations for both buyer and seller (NBAA, 2023).

An APA typically includes:

1. Exact aircraft identification (registration, serial numbers, engines, components)
2. Final purchase price and payment structure
3. Escrow instructions
4. Representations and warranties
5. Delivery conditions
6. Closing procedures
7. Liability provisions
8. Risk allocation

Once signed, the APA becomes the primary legal document governing the aircraft transaction.

If either party fails to comply with its terms, the agreement provides the legal basis for remedies such as deposit forfeiture or contract enforcement.

Key Differences Between an LOI and an Aircraft Purchase Agreement

Understanding the difference between an LOI and an APA is essential when structuring an aircraft purchase.

In short:

The LOI starts the transaction.

The APA completes it.

Why Aircraft Transactions Usually Start With an LOI

Many aircraft transactions begin with an LOI because it helps both parties move forward efficiently while limiting legal exposure.

Some key advantages include:

Faster Negotiation

An LOI allows buyers and sellers to agree on major terms quickly without drafting a full contract.

Lower Legal Costs

Preparing a full purchase agreement requires extensive legal work. An LOI prevents unnecessary legal fees if the deal ultimately does not proceed.

Structured Due Diligence

The LOI typically outlines the timeline for the pre-purchase inspection, escrow setup, and closing schedule.

Transaction Clarity

It ensures both parties are aligned on major points such as price, inspection rights, and deposit structure before moving to a binding contract.

According to aviation transaction guidance from AOPA, the LOI is often used to “memorialize the key terms of the deal while leaving room for detailed negotiation later in the purchase agreement” (AOPA, 2022).

What Happens Between the LOI and the APA?

Once the LOI is signed, the transaction typically moves into the due diligence phase.

This phase often includes:

1. Pre-purchase inspection
2. Logbook review
3. Airworthiness directive compliance verification
4. Title search
5. Escrow setup
6. Financing arrangements

During this period, attorneys and brokers draft the Aircraft Purchase Agreement, incorporating findings from the inspection and negotiated adjustments to the deal structure.

Only after both parties agree to the APA terms does the transaction proceed to closing.

The Importance of Professional Guidance

Aircraft transactions are complex and involve multiple technical, financial, and regulatory factors. Errors in either the LOI or the APA can lead to disputes, unexpected liabilities, or delayed closings.

Working with experienced aviation professionals helps ensure that:

1. The LOI reflects realistic and enforceable terms
2. Inspection rights and contingencies are properly defined
3. The APA protects your financial and operational interests
4. Regulatory and documentation requirements are met

At Jetvisors, we guide clients through every stage of the aircraft acquisition process—from the initial LOI through final closing and delivery.

How Jetvisors Helps Structure Aircraft Transactions

When buyers or sellers work with Jetvisors, we assist with the entire transaction process, including:

1. Drafting and negotiating Letters of Intent
2. Coordinating pre-purchase inspections
3. Reviewing aircraft records and maintenance history
4. Working with aviation attorneys and escrow agents
5. Managing the Aircraft Purchase Agreement process
6. Ensuring a smooth and secure closing

Our goal is to ensure every aircraft transaction is structured correctly, negotiated strategically, and executed efficiently.

Conclusion

Understanding the difference between a Letter of Intent (LOI) and an Aircraft Purchase Agreement (APA) is essential when buying or selling an aircraft.

The LOI sets the stage by outlining the basic deal terms and allowing both parties to begin due diligence. The APA then finalizes the transaction with a comprehensive, legally binding contract.

When structured properly, these two documents work together to protect both buyers and sellers while ensuring the transaction moves forward smoothly.

If you are considering purchasing or selling an aircraft, working with an experienced aircraft broker can help you navigate these steps with confidence.

Jetvisors is here to guide you through every stage of the process—from the first LOI to final aircraft delivery.

References

Aircraft Owners and Pilots Association (AOPA). (2022). Everything you need to know about buying an aircraft. AOPA Finance.

McAfee & Taft. (2020). Letters of intent in aircraft transactions: Legal considerations. Aviation Law Advisory.

National Business Aviation Association (NBAA). (2023). Aircraft transactions: Best practices for buyers and sellers. NBAA.