Should I Use Miles or Cash Calculator

Deciding between using your hard-earned airline miles or paying with cash can be tricky. This calculator helps you determine the value you’re getting for your miles on a specific flight, empowering you to make a smarter choice.

Calculation Results

Value Per Mile for This Flight: cents

Your Personal Valuation: cents per mile

Total Cash Saved by Using Miles: $

This calculation is based on the formula: (Cash Price – Fees with Miles) / Miles Required.

What is a Should I Use Miles or Cash Calculator?

A “Should I Use Miles or Cash Calculator” is a financial tool designed for travelers who are part of airline loyalty programs. It helps them make an informed decision on whether to use their accumulated frequent flyer miles or pay with cash for a particular flight. The core function of this calculator is to determine the “cents per mile” (CPM) value for a specific redemption. By comparing this redemption value against their own personal valuation of what a mile is worth, travelers can objectively decide which payment method offers better financial value.

This is crucial because the value of an airline mile is not fixed; it fluctuates based on the cash price of the flight you’re booking. A flight that is expensive in cash but relatively cheap in miles offers a high CPM, making it a good use of miles. Conversely, a cheap flight that requires a large number of miles offers a low CPM, suggesting that paying with cash and saving the miles for a more valuable future redemption is the wiser choice. Our travel rewards calculator can help you explore this further.

The Formula Behind the Miles vs. Cash Decision

The calculation to determine the value of a mile for a specific flight is straightforward. It tells you exactly how many cents of value you are getting for each mile you spend.

The formula is:

Cents per Mile (CPM) = (Cash Price of Ticket – Taxes & Fees on Award Ticket) / Number of Miles Required

Once you have this value, you compare it to your personal valuation of a mile. If the CPM for the flight is higher than your personal value, using miles is generally a good deal. If it’s lower, you’re better off paying with cash.

Variables in the Calculation

Variable	Meaning	Unit	Typical Range
Cash Price of Ticket	The full price of the flight if purchased with money.	USD ($)	$50 – $10,000+
Taxes & Fees on Award Ticket	Mandatory government taxes and carrier-imposed fees paid on a miles booking.	USD ($)	$5.60 – $1,000+
Number of Miles Required	The total miles needed to book the award ticket.	Miles	5,000 – 500,000+
Personal Mile Valuation	Your own target value for what one mile is worth.	Cents (¢)	1.0¢ – 3.0¢

Practical Examples

Example 1: Good Value Redemption (Domestic Flight)

Let’s say you’re looking at a last-minute cross-country flight from New York to Los Angeles.

• Inputs:
  • Cash Price: $650
  • Miles Required: 30,000
  • Taxes & Fees with Miles: $11.20
• Calculation: ($650 – $11.20) / 30,000 miles = $0.0212 per mile
• Result: 2.12 cents per mile. If your personal valuation is 1.5 cents per mile, this is an excellent redemption. You get over 2 cents per mile in value, which is generally considered a great deal. Using miles is the clear winner.

Example 2: Poor Value Redemption (International Flight)

Now, consider a promotional sale for a flight from Chicago to London.

• Inputs:
  • Cash Price: $550
  • Miles Required: 60,000
  • Taxes & Fees with Miles: $180
• Calculation: ($550 – $180) / 60,000 miles = $0.0061 per mile
• Result: 0.61 cents per mile. This is a very poor redemption value. You would be better off paying the $550 in cash and saving your 60,000 miles for a future trip where they can provide significantly more value. Explore our guide on airline miles valuation to learn more about maximizing your points.

How to Use This Should I Use Miles or Cash Calculator

1. Enter the Cash Price: Input the total cost of the flight if you were to pay with cash.
2. Enter the Miles Required: Input the number of miles the airline is asking for the same flight.
3. Add the Fees: Don’t forget to add any mandatory taxes and carrier-imposed fees that you must pay even when using miles.
4. Set Your Personal Value: Adjust the “Your Personal Mile Valuation” field. This is your benchmark for a “good” redemption. A common starting point is 1.5 cents, but this can vary by airline and your travel goals.
5. Analyze the Results: The calculator will instantly show you the cents per mile value for this specific flight and provide a recommendation. If the flight’s value is higher than your personal value, using miles is recommended.

Key Factors That Affect the Miles vs. Cash Decision

• Airline Loyalty Program: The value of a mile varies significantly between airlines. For example, some programs have more valuable transfer partners or better award chart sweet spots.
• Travel Class: You often get a much higher cents per mile value when redeeming for business or first-class seats, as their cash prices are exponentially higher than economy.
• Booking in Advance vs. Last Minute: Last-minute flights often have exorbitant cash prices, which can make using miles an incredibly high-value proposition.
• Airline Surcharges: Some airlines, particularly international carriers, add hefty surcharges to award tickets, which can significantly decrease the value of your redemption. Always factor these in.
• Your Travel Goals: Are you saving up for a specific aspirational trip, like a round-the-world ticket in business class? If so, you might be more selective about using miles on lower-value redemptions. If you just want to save cash on any trip, you might be more flexible.
• Point Devaluation Risk: Airline miles are not an investment; they generally lose value over time as airlines change their award charts. Hoarding miles for too long can be risky. Consider our insights on cash vs. miles flight redemption for more on this topic.

Frequently Asked Questions

1. What is a good cents per mile (CPM) value?

Generally, a value of 2 cents per mile or higher is considered excellent. Anything below 1 cent per mile is usually a poor redemption. Most travel experts aim for 1.5 cents or more.

2. Should I always use miles for expensive flights?

Not necessarily. While expensive flights often yield a high CPM, you should still run the numbers. An expensive flight might also require a proportionally high number of miles, resulting in an average or poor value.

3. Do I earn miles when I book a flight with miles?

Typically, no. Award tickets booked with miles do not earn new miles or count towards elite status qualification. This is an opportunity cost to consider. Learn more with our guide on calculating airline mile value.

4. Can the value of miles change?

Yes, airlines can devalue their miles at any time by increasing the number of miles required for flights. This is a key reason why it’s often better to “earn and burn” miles rather than hoard them for years.

5. What if I don’t have enough miles for the whole ticket?

Many airlines offer a “Miles & Cash” option. In these cases, you are essentially “buying” the extra miles you need from the airline, often at a poor value. It’s usually better to either pay fully with cash or wait until you have enough miles.

6. Is it better to use miles for domestic or international flights?

It depends entirely on the specific redemption value. You can find great value on both domestic and international routes. However, the highest potential value is often found on long-haul international business or first-class tickets.

7. Are there any hidden fees when using miles?

Always check for carrier-imposed surcharges, especially on international flights. These can sometimes add hundreds of dollars to an “award” ticket, drastically reducing the value of your miles.

8. Where can I find the value of different airline miles?

Many travel blogs and financial websites publish monthly valuations for airline and hotel points, which can be a good starting point for your personal valuation. NerdWallet and The Points Guy are popular resources. You can also learn more from our page on airline loyalty programs.