How to Use the Duffel Connector in Muse

1. The short answer

As of October 25, 2026, Duffel is a live connector in Muse. It was live at launch on September 8, 2026. It is a phone only connector, managed on your device, and it is not one of the 54 connectors counted in the web app in the October 15 check. Say so plainly: if you open Muse on the web and look for Duffel in the list, you will not find it there, because it lives on the phone app instead. Through Duffel, Muse searches live inventory and prices from more than 500 airlines, and you can search, book, cancel, and manage trips in plain words. Every purchase waits for your approval, and payment runs through Stripe Link with a one time card. Hotels are a different story: they run through the browser, not through Duffel.

Here is the honest version. Duffel is the connector that turns Muse from a trip planner into a travel agent, and that is exactly why it deserves the most care on this page. Searching flights is free and reversible. Booking one is money, a name on a ticket, and a date you cannot undo with a chat message. The rest of this guide covers how to search, the money safety rules to set first, the wrong name caution from October, and the limits to know before you lean on it. Our complete connectors list shows where Duffel sits among the live connectors, and which ones are phone only like this one.

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2. What you need

• Muse access. You need an account with access first, in the United States, Canada, or Japan, where Muse has launched.
• The Muse phone app. Duffel is a phone only connector, managed on your device. The web app does not list it, so do this on your phone.
• No Duffel login. The connector needs no user login. You do not create a Duffel account and you do not sign in to one.
• A payment method through Stripe Link. Bookings pay through Link by Stripe with a one time card. Set that up before you ask Muse to book anything.
• Your exact traveler details. Full legal names exactly as they appear on passports, dates of birth where asked, and the cabin you want. A name spelled wrong on a ticket is a real problem, and it is the subject of the caution in section 5.
• Approvals set to ask me. This is the single most important step on this page. A flight is the most expensive thing Muse can buy, so the purchase must wait for your tap.

3. How to search and book, step by step

Searching and booking are two different jobs, and the method keeps them apart. Search freely. Book slowly, with every detail read back first.

1. Open Muse on your phone. Duffel is managed on your device, not in the web app. Open the Muse app and confirm the connector is listed there.
2. Set approvals to ask me. Do this before your first search. Every purchase must wait for you, with no exceptions for cheap fares or urgent trips.
3. Search with exact airport codes. Name the airports, the dates, the cabin, and the travelers. A city code such as NYC searches every airport in the city at once, while an airport code searches only that airport. Use the exact code for the airport you mean, because a guessed code can quietly search the wrong airport.
4. Price the full passenger mix. Adults, children with their ages, and infants, with each infant either on a lap or in a seat. Prices depend on each traveler type and age, so a child searched as an adult is priced and ticketed wrongly. Say whether each infant under two sits on a lap or in a seat, instead of leaving Muse to guess.
5. Compare the cheapest, the fastest, and the best tradeoff. Ask for all three. The cheapest flight is often the longest, and the fastest is often the priciest. The best tradeoff is usually the flight you actually want, and it only appears when you ask for it.
6. Check the fare terms before you choose. Refundable, changeable, bags included, seat selection included. A cheap fare with no bags and no changes is not a cheap fare once you add them back. Ask Muse to read the terms for the fare you picked, not just the price.
7. Validate, then approve, then book. Muse validates the fare, shows you the exact itinerary, the exact traveler names, and the exact total, and waits. Read every name letter by letter against the passport. Then approve. Then check the booking confirmation and the booking reference the moment it arrives.

Copy this prompt

You are my flight booker. Use my Duffel connector only.
Rules: you search, compare, and validate. You never book without my explicit approval. Show me the options first, with the price, the airline, the times, the stops, and the fare terms for each one. I approve every purchase.
My trip: [origin airport code, destination airport code, departure date, return date]
My travelers: [adults, children with ages, infants and whether each sits on a lap or in a seat]
My cabin: [economy, premium economy, business, or first]
My limits: [max price, nonstop only or stops fine, airlines to avoid]
When I ask you to search, do this in order.
1. Search the exact airports and dates I gave you. If a search covers only part of the route, say so.
2. Show me the cheapest, the fastest, and the best tradeoff, with the fare terms for each one.
3. End with your pick and one sentence saying why.
When I pick a flight, validate the fare, then stop and wait for me. Show me the exact itinerary, the exact traveler names as they appear on passports, and the exact total, including bags and fees, before I approve anything.

4. What it actually does

The connector earns its place with five uses. Everything else is a variation on one of them.

Search live fares across 500 plus airlines

Ask Muse to search a route and it reads live inventory and real time prices from more than 500 airlines through Duffel. The search covers round trips, one way trips, and multi city trips, in economy, premium economy, business, or first. It can search several nearby airports at once, flexible dates around your departure, and nonstop only when you ask. The result is a ranked list: the cheapest, the fastest, the best tradeoffs, and the cheapest nonstop. One search covers price and duration together, so ask for the full picture instead of running the same search three times with different words.

Compare fares, not just prices

Ask Muse to compare the fare terms, not just the price. A fare is a bundle: refundable or not, changeable or not, bags included or not, seat selection included or not. Two flights at the same price can be different products, and the cheaper one is often the one that charges you later. Ask for the cabin and the fare brand on each leg, because a domestic premium cabin may be sold as First without a lie flat seat, and economy on one airline is a different product from economy on another. The comparison that names the terms is the comparison worth reading.

Book, cancel, and manage trips

Ask Muse to book the flight you picked, and it validates the fare and books it after your approval. Ask it to check a booking, quote a cancellation, or cancel a trip, and it does that too. Duffel provides human support around the clock behind the agent, so a booking that goes wrong has a human to call, not just a chat window. Managing a trip is the use most people forget until they need it: the flight that changed, the trip that no longer works, and the cancellation quote you want before you decide. Ask for the quote first. A cancellation decided on a guess is a refund lost.

Price the whole party correctly

Ask Muse to price every traveler in the party, with the right type and age for each one. An adult, a child aged 2 to 17, and a lap infant are three different prices, and a child searched as an adult is ticketed wrongly. Say whether each infant under two sits on a lap or in a seat. An infant who needs a seat has to book with the airline, because this connector cannot validate that case, and finding that out after the purchase is the worst time to learn it. The passenger mix is the detail that most often breaks a booking, so give it exactly, every time.

Split tickets, explained honestly

Sometimes the cheapest trip is two one way tickets instead of one round trip ticket. Muse shows these as split tickets, each a real ticket with its own fare terms and bags, and names the pair total next to the single ticket total. The warning matters more than the saving: a delay or a change on one ticket is not protected by the other. If the outbound is delayed and you miss the return on a separate ticket, the return airline owes you nothing. A split ticket that saves real money is worth it. A split ticket that saves a little money on a tight connection is a risk you bought, not a deal you found.

Hotels are not Duffel

Flights run through Duffel. Hotels run through the browser, on consumer travel sites such as Expedia and Hotels.com. Say so plainly, because the two halves of a trip feel like one job and they are two different connectors with two different rules. Our Browser connector guide covers the hotel half, including the approval rule and the sites that block the browser.

5. Money safety: the rules to set first

A flight is the most expensive thing Muse can buy, so the money rules come before the first search, not after the first booking.

Approvals on ask me, always. Nothing is purchased without your approval. That is the rule Meta states for Muse, and it is the rule that makes everything else on this page work. Keep it on ask me for anything that commits you, and nothing is booked without your say. If you turn approvals off for convenience, you lose the one check that catches a wrong name, a wrong date, or a wrong total.

Read the names letter by letter. An October 2026 report described a Muse Duffel booking made under the wrong name. We are not adding details to that report, because the details were not verified, but the lesson is verified by every traveler who has ever fixed a misspelled ticket: the name on the ticket must match the passport exactly. Before you approve any booking, read every traveler name against the passport, letter by letter, out loud if it helps. A name fixed before approval costs nothing. A name fixed after ticketing costs a fee, a phone call, and sometimes the whole fare.

Read the total, not the headline price. The price on the search page is the offer. The total on the approval screen is the purchase. Bags, seat selection, and fees can sit between them, and the approval screen is the last place the gap can be caught. If the total does not match the price Muse quoted, stop and ask why before you tap anything.

Know who holds the refund. It is not public which company is the merchant of record on a Muse flight booking: Duffel can act as the merchant of record in one setup, and the airline or another supplier in another. That matters because the merchant of record is the company that holds the refund obligation if a flight is cancelled or significantly changed. After you book, check your card statement and note which company name appears. That name is the one to call about a refund.

Keep the confirmation the moment it arrives. The booking reference, the confirmation number, and the itinerary are your proof of purchase. Save them where you can find them without opening Muse, because a booking you cannot find is a booking you cannot change. Check the confirmation against what you approved: same flights, same names, same dates, same total. A mismatch found in the first hour is fixable. A mismatch found at the airport is not.

6. What it cannot do

The limits are honest and worth knowing before you lean on the connector.

• It cannot book without your approval when approvals are set right. That is a feature, not a bug. If you turn approvals off, you lose the safety net, so keep them on for every purchase.
• It cannot find it in the web app. Duffel is a phone only connector, managed on your device. It is not in the web app's 54 connectors, so open Muse on your phone to use it.
• It cannot report live flight status. Duffel searches, books, and manages trips. It does not tell you whether a flight is delayed right now. Check the airline for live status.
• It cannot book a hotel. Hotels run through the browser, not through Duffel. If you ask for a hotel, Muse should use the Browser connector, and the flight half of the trip is the part Duffel handles.
• It cannot validate an infant in a seat. An infant under two who needs a seat has to book with the airline, because this connector cannot validate that case. Say so at search time, not at checkout.
• It cannot fix a wrong name for free. A name spelled wrong on a ticket is a problem with the airline, not with Muse. Read the names before you approve, because after approval the fix costs time and money.

7. What to watch for

As of October 25, 2026, Duffel is a live connector: live since September 8, and unchanged by the October 7 iPad app launch and the October 23 Japan launch. There is no October update to how it works, so the habits around it still matter. Search with exact airport codes. The connector accepts any three letters, so a guessed code for a small or ambiguous place can quietly search the wrong airport. A city code searches every airport in the city, which is useful when you are flexible, and a single airport code searches only that airport, which is what you want when you are not.

Check coverage before you conclude there are no flights. A search can be incomplete: only the airlines that answered in time are in the result, and an airline that did not answer may still fly the route. If the carrier you expected is missing, say so and ask Muse to run a targeted search for that airline before you turn to the airline site. An empty result is not proof of no flights. It is proof of an incomplete search.

Be careful with refundable. A fare marked refundable means refundable before departure without a penalty, which is not the same as cancel anytime. Some offers carry unstated refund terms, and those are unknown, not nonrefundable. Read the terms for the fare you picked, and if the terms are unstated, treat them as unstated, not as a promise.

Finally, remember the phone only rule when you plan. If you are shopping flights on your computer, open Muse on your phone instead. The connector is not in the web app, and looking for it there is a waste of your evening. On the phone, it is one search, one validation, and one approval, and the whole job takes less time than the airline site would.

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Frequently asked questions

Can Muse book flights for me?

Yes, through Duffel. Muse searches live fares from more than 500 airlines, validates the fare you pick, and books it after your approval. Payment runs through Stripe Link with a one time card. Nothing is booked without your approval.

Why can I not find Duffel in the Muse web app?

Because it is a phone only connector, managed on your device. It is not one of the 54 connectors in the web app. Open Muse on your phone to use it.

Can Muse book hotels too?

Not through Duffel. Hotels run through the Browser connector, on consumer travel sites such as Expedia and Hotels.com. Flights are the part Duffel handles.

What happens if the name on the ticket is wrong?

The name must match the passport exactly. An October 2026 report described a Muse Duffel booking made under the wrong name, so read every traveler name letter by letter against the passport before you approve. After approval, fixing a name costs time and money.

Does Duffel show live flight status?

No. Duffel searches, books, and manages trips. It does not report whether a flight is delayed right now. Check the airline for live status.

Can I use the Duffel connector outside the United States, Canada, and Japan?

Not yet. Muse itself has launched in the United States, Canada, and Japan only. Join the waitlist and we will send you a fresh code on launch day in your country.

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